That would be this:
Blogger asks us to "prove you're not a bot" while Wordpress just gives us indecipherable words that sometimes takes up to three tries to get right (Blogger's WV is indecipherable at times, too). It's ALMOST enough to make a body decline to comment on the blogs that use this shit. My biggest problem/issue is the fact bots don't type... so WHY does the word picture have to be so fucked up? Why not use straightforward text?