Oh hell, I've thought of a couple more...
The window cleaner, who used to have a brew/cake at our house. Had replacement windows fitted, and the porch was removed, and took months for the firm to make a custom fit new one, pretty much the same as the other one. Builders left me with an inner door as a front door. Window cleaner carries on, charging the same amount as if the porch that he cleans was present. When the porch was eventually replaced, tried to charge me extra for the porch! Cunty fucker! Needless to say, he doesn't get a brew any more, so I think he shot himself in the foot.
Even for CF. When DH moved in to my house, he had a flat. His family were desperate for him to move in with me, so that DH's adult nephew could move in, and stop driving family members who he was then living with a bit bonkers. So I actually had him move in a little before I was ready for it, more fool me. The only requirement, in return for leaving nephew with all crockery, additional furniture, hoovers kitchen electronics etc, was that he look after the resident free range budgie. His father, DH's brother, was meant to give a token couple of hundred pounds for the other stuff. Not only did this not materialise, but within a week the budgie was looking for a new home, we couldn't have him, cos of Spongecat. I was frantically trying to find him a new home, and managed to get him in an aviary eventually, but I seemed to care more about it than other people
. Six months down the line, nephew had defaulted on rent, and was back living with family. He came to do a small job at our house, and then claimed £5 back for parts. I actually had to keep out of his way, as I would have said something I might have regretted later.