Hah, wow... That sounds simply brazenly. I also had some hysterical conversations like that, when people were blaming me that "I'm your follower, and you don't vote for me!", but nothing like this.
Btw I also regularly upvote posts of people who comment on my posts, and see nothing shameful in it... Of course if it's not "Nice art, keep it up" comment, cause in that case I'm ready to kill:)