Parents refused to convert to Linux when I asked them to. New icons, they didn't like it. I said fine, and cut them off the tech support I provided when visiting. They will be on win 7 for a long long time I feel. What do I care though, it's their life.
I have to mention, I work in software development. When family and new people ask if I could help them with their problem I always ask if they can help with rewiring my flat's power lines. You know, you said you work in accounting, it's kinda like electrical work, right? The computer you work on has electricity.
Sometimes I just feel them my hourly rate as a contractor. They gasp and figure the problem themselves.
Once you have been on the other side of the coffee shops' router, you'll learn to bring your own hotspot/SIM card in the laptop. I once found a sniffer effectively pulling a man in the middle. I wiped the router's firmware.