What business someone got when using other destination url in adwords campaigns? Is it going to make a bad reputation by sending vistors to site not relevant to ad..

explain what you mean by "other destination url"

I mean what's going on when someone else using my url in adwords ads to advertise my url

Huh?
It's their money they are wasting, I'd use it to my advantage and create a page that converts well, at least while they are daft enough to buy you traffic.

Are you paying google for advertising?

No, I don't pay. Someone else using my URL for advertising.