Over on the Freakonomics blog, they’re asking: Are you a web tipper?

I hadn’t thought about it before, but apparently some people randomly click on online ads (even if they’re not interested and won’t read the resultant page) just to get a little money going to the content provider, to help keep the content free.

Interesting idea, though I wonder if advertisers would eventually shy away from paying for ads that get seen and clicked-on, but don’t have a return through sales.