I've noticed at least one "member" who's sporting the "dontate to me" button without any contributions to the forums and with a very low post count. Are there no rules around having this button? I've read the original announcement post and the intention of the buttons is for developer benefit.
It seems that folks see it as simply a potential money making button without actually doing any work. While I'm all for free money I don't think that's the intention or the purpose of the XDA community forums.
I'd like to suggest that the button only be available for activation after you achieve some threshold on the forum. Either 1) you have an active developer contribution to the site (downloadable, verfied, etc) or you have achieved some specific number of "thanks" from validated members.
It just really bothers me to see people diluting a feature intended to benefit those that are actually doing work.