You have my complete sympathy.
I manage quite well without a TV as well, and it has taken me years to get the messsage accross to the TV licensing people that I do not have one. I'm not at all sure that they believe me, but the last time I had one of them knock on my door I told him (yet again) that I have no set, so don't need a licence. The cheeky so and so asked me to "let me have a look round, to check" so I told him to "F off", and asked him to give me his address so that I could call round to his place sometime, unannounced, and have a snoop round his house. He went off mumbling something about detector vans, so I called after him that he should get one to park itself permanently outside my home.
Haven't heard a word from them since.
Don't care if they believe me or not. I do not have to prove anything. If they want money from me they have to prove I have a TV, and they, obviously, can't.
Don't be intimidated by them.
Don't get a licence just to shut them up. Why should you pay out £140 a year for the rest of your days just to aoid dealing with those fools?
Next time you get a letter, or visit, from them, reply (once again) that you have no TV, and ask them when they are taking Noel Edmunds to court following his very public announcement, last week, that he has not renewed his licence, and will not be doing until the BBCs output improves.
Sorry that this answer is so long, but they really annoy me.