That's an interesting observation. I bet porn addiction has gotten worse for some people for the same reason. You used to have to suffer the indignity of walking into a seedy porn shop to get porn and it was expensive. Now it's piped into your home, and there there's more free porn on the internet than you can watch in a lifetime. Anyway, to answer your question, I would tell you to give your brother in law administrative control of your computer or router and download a blocklist that includes the Tor entry guards, but Tor offers circumvention techniques that make blocking all access to the network difficult. Even if torproject.org is blocked, you can get the browser bundle emailed to a Gmail or Yahoo account. You can use bridges that aren't on a block list. If you are determined enough, you can get around the barriers that someone else puts up. Maybe give him all your money so you can't buy bitcoins? Then he can give you a daily allowance for food and stuff.