If all your ads were in a div or images/links with a certain CSS id, class or style (basically, every element formatted in any way does!) then they can be hidden separately.

Which is nice :-)

Actually, I don’t know about that. I haven’t looked into it, but I would assume the local CSS sheet would just set display:none or something. With Javascript you could setup a timer to check divs on the page, see if that it was set to no-show, and unset it.

Just guessing – I haven’t played much with that from the client side of things. Sound like an interesting thing to look at though ^_^.

Also, again that’s the client using the div ID and overriding the style. If you keep the div ID random it’d be harder to hide (especially inline with an article or something)

(of course, if they have adblock on and javascript off there is not much you could do about it aside from this kind of thing that would reshow the ad / change the div id on next page load)

Ad-block should just make an alternative mechanism that looks at your DOM and generates a user-defined stylesheet to hide the ads. The website can’t override that. But then I can think of counters to that in the case that the ad is not neatly inside an IDed or classed element…so yeah, turns into an arms race.