Competitors using bots for AdWords ?

[iung]

I was having a discussion with a SEO manager on a LinkedIn group about page speed (she pretends that page speed is not taken into account by Google for SERPs at all and claims that all of what Matt Cutts says is BS) ; and she explained that she is using bots to click on her client's competitors AdWords and "kill their daily budget"

So my question is, if you run/manage AdWords campaigns, have you ever met noticed such a behaviour, past the few usual click fraud rate ? What is your average fraud rate ?

[gcdtechnologies]

Wow. That's quite an audacious thing to admit on LinkedIn... I've only seen one campaign that I suspected was the target of click fraud, and that had about 15% suspicious clicks rate. In my other campaigns I honestly haven't seen anything above 2 or 3%.

[DavidKonigsberg]

It depends on the industry i have seen 30% click fraud - google tends to credit back the money but it could max out a daily budget. -You can also have google to a special audit to see if any strange click patterns are happening.