As usual, I try to say "Thank You!" to all of the deviants who have -ed my work or who have added me to their "watchlist". But, sometimes, when there are too many s (I like s, so go and some of my wallpapers), it's very hard to answer all of them. Besides, deviantART recognizes/considers such big amount of "Thank You!" messages as spam and temporarily blocks your ability to send the messages. So, what if there will be a possibility to say "Thank You!" right from your message center without visiting all "userpages" one by one? I know, that visit is a sign of politeness as well, but if each such "Thank You!" message will add one "page view" besides the comment to the deviant's "userpage", by my opinion, everything will be within the confines of politeness.
I agree that it's a good idea but it's also a bad idea, It's a good idea because visiting everyone's page and typing just,"Thanks for the Fave." Is time consuming especially if you get thousands of faves a week. But it also sets the precedent for SPAM messages in Auto-Replies. I guess every system has it flaws and strengths. I would like to see this implemented only because i find myself being lazy and don't want to be bothered with doing a whole bunch of thank you's. The costs out weigh the risks.