AT&T, Verizon and other major advertisers are suspending their marketing campaigns on Google's YouTube site after discovering their brands have been appearing alongside videos promoting terrorism.

Although the boycott could just be temporary, it could cost Google hundreds of millions of dollars.

The diverse selection of Youtube's videos periodically allows ads to appear next to videos that marketers find distasteful, despite Google's efforts to prevent it from happening.

Earlier this week, Google vowed to step up its efforts to block ads on "hateful, offensive and derogatory" videos. The company has begun a review of its advertising policies.

On the other hand, Youtube has become a very strong medium for companies as their ad campaigns are exposed to million of users daily, so in the long run, completely abandoning it is out of questiton.

With their move, both AT&T, Verizon are making headlines, gaining some extra exposure and show a politically correct stance in matters such as terrorism.