Hi, all Newbie here. Hope this is the proper place for this question. I was browsing here yesterday and came across somebody suggesting that someone else's click through rate was going down because their ID had been hacked. (I think that was the terminology used, I can't find that post again!) Anyway, my question is, how prevalent is this ID hacking, how can you find out for sure if its happening to you - will changing your password on a monthly basis prevent this? - and anything else you'd like to add. I have a webzine and use Google Adsense on it. I don't do very well with it (but then my zine readership isn't all that great...yet, I hope...) Thanks for any help.