Hm. I had multiple UK visas (but only visited once lol) and I don't remember that. Granted, all of those visas were applied for with assistance from the job I had at the time. The entry form was also much more boring.
Kinda makes me wonder what happens if someone checks yes. How do they deal with that?
Probably deny you entry?
The UK also had a question about communist party membership on their visa application. Funny thing is that the UK also has a communist party.
The US has this question as well, but I've heard that it didn't eliminate people from China who were able to make a "I had to join the party to get a certain job" argument. I presume that as long as you don't voice actual support for the revolutionary aspects of the ideology, the migra won't care.