I don't see any of those things as political (except in the meaningless sense of the word where everything is political) and I don't think that's what they were talking about banning. If we actually worked at Basecamp we'd just fire off an email to whomever to confirm, but as is I think the best we can go with is a fair reading. To me, Basecamp wasn't banning speech of the form "I can't wait for the kids to be back in person at school. The schools have been closed too long."