You know, it's funny because I used to say the same thing about sedevacantists and sedevacantism.
I could start a thread about canning vegetables and certain sedevacantists would probably work the topic of sedevacantism into the thread.
I can see it now:
"...and once you're done, those vegetables will last for a few years on the shelf. Which is probably longer than world will last, considering the anti-Church occupying the Vatican right now, and the fact we've already been without a pope for 45 years."
In general, it's not a good sign if a person is so obsessed about a topic that he can't think or talk about anything else. Seriously, it is a psychological problem, even if a minor one.