I'll tell you a little story. I was sitting at the bar at the pool hall having a beer when all of a sudden I heard a voice say to me, "You are the man".
I looked around and no one was close to me at the time.
A minute or two later and I heard the same voice again, only this time it said, "and you are probably a great pool player too".
I looked at the guy behind the bar and asked him if he had said anything to me. He said no. I told him that I keep hearing voices and they are saying nice things to me.
He said, "oh, I know, its the peanuts, they're Complimentary".
I use Pre Flag. I run it down to half way and leave it on the table. I know lots of other guys that do the same.
No biggy, buy a 12 pack of Masters and I'm sure that at some point, you'll leave a few on the tables for others to use.
The biggest crooks in your country are in Washington and they steal a lot more than a 10 cent piece of chalk. Don't lose any sleep over it, the politicians aren't.