Msg#: 3611352 posted 9:15 pm on Mar 26, 2008 (gmt 0)
There certainly seems to be. When I publish a page I always stick a ?test=1 at the end of the URL and wait a bit to see what ads come up. Some topics are definitely poison although I've yet to see a definitive list and even suspect that it changes regularly (eg. sensitive news stories). I have also noticed that this effect can be sticky, ie. on a page that doesn't show ads because of a poison word - it will take a while, sometimes a couple of weeks even - hence the reason I use a "?test=1"
Msg#: 3611352 posted 1:04 am on Mar 27, 2008 (gmt 0)
I'll add to that, talking of blogs as its definitely possible for a visitor to poison your page by dropping in a few rogue comments. Furthermore, the section targeting tags (weight=ignore) don't seem to work, or at least not very well. I did lots of testing on this.
I actually converted the comments to an Ajax call to pull them in after the page had loaded. Worked fine for the ads, but it killed my traffic significantly enough to put it back the way it was in a real hurry. Took about a week to recover from that particular experiment.