Definitely not the only one, gives me the serious creeps. I try to ignore those as much as possible.

I also pretty much ignore any apps that exhort you to pass it on to 100 of your friends or similar.

The only reason I joined in the first place was it was the easiest way to play scrabulous with a good friend. I've added a couple of small apps since then, but mostly ignored the rest. (Even the virtual bookshelf thing which looks OK but I already have librarything to maintain)