Given rules that members are forbidden from posting hate speech there might be legal responsibility for the host to allow certain messages to be posted, because that implies a judgement that they aren't hate speech.
IANAL, but that doesn't sound very likely to me.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.