I have a perpetual and chronic problem here with people asking me at the most inappropriate and unprofessional times if I could teach their kids/themselves English outside of where I work, cause it would cost less, or cause they don't like my workplace (where I am really very happy).
First. I work there, so if you don't like it, what are you saying?
Second, pay me what you'd pay them, no?
Third, do you think I adore you/your kids so very very much that I would want to break my contract and jeopardise my job for them? I barely know you!
The ones that really bite me are the folks who ask me when I am asking them for professional work, like yesterday's architect.
The ones I really get a good hate on for though are people who basically ignore me completely, sometimes quite rudely and then ask. Two different mothers on Youngest's basketball team who never. speak. to. me. -which is quite impressively rude in a small town- and then have the unmitigated cojones to ask me to teach their kids. After I say no, they go back to the silent treatment.
Cows. Wasn't that polite? May they someday be immigrants in another place and folks treat them that way.
The best story though? The very best? A co-teacher was at the gynocologists. Yup, feet up in the stirrups. The doctor looks up from, well, from what she was doing and opens that conversation, "You teach English don't you? Could you help my daughter......."