The Top 10 Most Annoying, Frustrating, Irritating, and Sinister Online Ads

They're well beyond bells and whistles: Advertisers are flashing, honking, slithering, and sometimes delivering malware to get your attention.

7. Expanding Ads

Another type of ad that's growing in popularity looks like a regular static ad running on the side or top of Web pages. Yet these ads are anything but ordinary. If you mouse over them, they spread across your screen, taking over your browser window. When you move your mouse away, they slither back to their original, unassuming size.

These ads are getting even slicker, now featuring audio, video, and interactive games. The ads are typically on sites that cater to younger demographics--people, EyeWonder's Scheidt says, who may like such rich media ads.

I don't know about you, but I'm never happy when I accidentally roll my pointer over the top-right corner of a Web page and a Flash animation pretends to peel back the page and show me an ad. Unfortunately, I have to deal with these on my own online home: runs this type of ad on occasion as well.

8. Personal and Tailored Ads

The behavioral-advertising business is booming with major online ad companies, with DoubleClick leading the pack. These companies give me the creeps, because they track my Web whereabouts and likely know more about my surfing habits than I do. Many create digital dossiers of online users that advertisers can use to show you ads tailored to your online activities.

The move toward behavior-based marketing is a trend, says Greg Sterling, an analyst with mobile market research firm Opus Research in San Francisco. That trend motivated Google to acquire DoubleClick, with the intention of targeting and selling ads more effectively. Privacy activists, of course, are foaming at the mouth, concerned that Google and DoubleClick will know too much about Internet users.

This approach marks a shift from the online advertising model Google established, which displays ads based on a person's keyword searches.

To counter the trend, many privacy activists are urging the Federal Trade Commission to create a "Do Not Track" database; consumers registering there could opt out of being tracked by DoubleClick and other online marketers.

9. Malware-Laced Ads

No question about it: Online ads that deliver malicious software are beyond merely annoying. Security firm ScanSafe tracks dangerous banner ads that have shown up on MySpace, PhotoBucket, and other leading sites. Such parasite ads typically contain a Flash file that silently installs a Trojan horse or backdoor program on vulnerable Windows systems. Reportedly, 12 million such ads came from RightMedia, an advertising firm in which Yahoo owns an 80 percent stake.

The most devious aspect of these ads is that they require no interaction from you, and Web sites sometimes deliver them innocently. They often come from third-party ad suppliers that act as middlemen between Web sites and advertisers. Sometimes the company delivering the ads to a site is unaware that a bad-apple advertiser has embedded Trojan horses in them. By sheer bad luck you could visit a Web site that inadvertently hosts a Trojan horse ad, and risk infection, says Mary Landesman, a senior researcher at ScanSafe.

"We find this stuff all the time," Landesman says. "We could report one every week."

Join the newsletter!


Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.
Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Tom Spring

PC World
Show Comments

Brand Post

Most Popular Reviews

Latest Articles


PCW Evaluation Team

Tom Sellers


This smart laptop was enjoyable to use and great to work on – creating content was super simple.

Lolita Wang


It really doesn’t get more “gaming laptop” than this.

Jack Jeffries


As the Maserati or BMW of laptops, it would fit perfectly in the hands of a professional needing firepower under the hood, sophistication and class on the surface, and gaming prowess (sports mode if you will) in between.

Taylor Carr


The MSI PS63 is an amazing laptop and I would definitely consider buying one in the future.

Christopher Low

Brother RJ-4230B

This small mobile printer is exactly what I need for invoicing and other jobs such as sending fellow tradesman details or step-by-step instructions that I can easily print off from my phone or the Web.

Aysha Strobbe

Microsoft Office 365/HP Spectre x360

Microsoft Office continues to make a student’s life that little bit easier by offering reliable, easy to use, time-saving functionality, while continuing to develop new features that further enhance what is already a formidable collection of applications

Featured Content

Product Launch Showcase

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?