The guy that has done nothing but complain about everything since he bought your product or joined your site.
The lady who consistently sends you emails telling you what you should do or how you should change your product or site.
The idiot who never reads your TOS or product emails because they bought with a damn throw away email address.
Don't get me wrong, I am one of the most patient people you will ever meet, and I have a great deal of respect for those who need a little extra push.
But at a certain point, the time they take up in your day ends up costing you more than they are paying for their product/service.
So the question is - at what point do you let them know that they are getting annoying and/or kick 'em to the curb?
Thanks for listening, I feel better already.