I lie my ass off about what I do/did now, have done since I moved to a new town. I can actually eat my dinner in peace. It's a shocking experience.
I was an excited geeky teenager when I first started working in IT, and happy to share my experience with all and sundry, but after a few years of getting calls from people I only tangentially knew who never spoke to me when there wasn't a 'computer crisis' I simply stopped bothering.
Oddly I think it was family that broke me, I was working retail IT, the closest thing this side of hell I can think of, at the time, and I had knocked off from a terrible week, and my mother rung me on the way home, telling me to get out to my aunts house to fix her computer... I was hungry, I was tired, and still in my work clothes, so I drag my ass half away across creation (my Aunt lived about 30kms away), and I get there as they are sitting down to tea, and I'm shoved into the back room to fix a freaking printer. No offer of coffee, no offer of food, nothing, hell she didn't even have the decency to ask me herself, she called my mother to ask me, a woman half a freaking state away, because she knew I wouldn't say no to her.
After all was said and done it wasn't even a bloody emergency, just a broken printer that could have waited.
I think that was the point I started telling people "come into the shop" and "sorry, no, I don't moonlight".