I do feel your pain @FixxerUpper (Well by proxy anyway!) My DH is very good at I.T. He got SO sick of people expecting him to be their 24/7 I.T. support, that he sent a blanket message out to everyone who had ever asked, (and any one who asked AFTER that,) to say he was no longer doing it, because it was taking up so much of his free time because so many people were asking him.
He must have had a dozen people ask over several years, and not ONE person offered to pay. 
A relative of mine plays in a band, (amateur/semi-pro, not famous or anything, but they do gigs and get paid for them,) and they get LOADS of people who know them/their families, asking, (no, EXPECTING!) them to perform for free. 
Ditto a friend of DD's who is an artist, and a bloody good one. She sells pictures she draws of people pets, and their houses, (and will attempt to draw anything they want.) The amount of people expecting her to do pictures for free is farcical.
People say 'it will help raise your profile, and is 'good exposure.' Funnily enough, 'good exposure' doesn't pay the rent and bills! 
My SIL used to work in social housing, and barely a week went by without someone asking if she could get them a house. Even people who rarely spoke to her usually, and had fuck-all to do with her most of the time. She said 'I can't even get MYSELF a social housing property, let alone anyone else!' 
Finally, someone I know has a job doing proof-reading for a major publishing house, and she keeps getting asked if she can 'run through some documents' and check them over for mistakes. (For free obviously.)
After about a year of this, she started to say she is not allowed, as she is contracted to the company, and will get in trouble if she does any work outside of it. 'Well not if you do it for free' they would say woefully. She said 'nope, I still can't do it.' Fucking cheek LOL.
Maybe you could try that @FixxerUpper telling people you are contracted to legally to your employer, and CANNOT give them legal advice, as you're not allowed. If they're obtuse enough to think they should get advice (and time) for free, from a person who has worked hard to get to that position they're in, then they're obtuse enough to believe the bullshit that you're NOT ALLOWED to do it for them. (for free.)