When ever I see this I think that it is rude. You cannot tell someone to leave you thinks you can receive it all day long but not demand it.
I know some people will not always leave thanks when it may be deserved but they may appreciate it in their own way and the goal is to help people out not do it just to earn points.
I would like to know if it is just me and maybe how I was raised or if other people feel the same way as me.
For those that do ask for "thanks" then please enlighten me as to why you do this. (Maybe I'm missing something.)