Depends, have they done something for you? Once many years ago friend of my roommate hung out all night, smoking my weed. After my friend went to sleep, I expected him to leave, but he was still there. I told him I needed to go get cigs on my bike, thinking that would get rid of him, but he offered to drive me there and back. I accepted at first, until he added 'as long as you give me five or ten dollars for gas'. I laughed in his face because it was less than a mile round-trip, got him to leave and never smoked him up after that.