I have, a few times, before I got around to rooting my tablet and installing adaway. The damn things fling the page around so much that you can end up tapping on them when the link you thought you were pressing suddenly shifts half a screen down to accommodate the enormous image that wasn't there a moment earlier.
The reg is particularly prone to this one, with those enormous banners that appear at the top and push the entire site down by a good quarter of the screen.