Submissions are mostly discouraged, but a civil discussion has no reason to be. It can easily go off the rails, but a lot of that is also based on how it's originally framed. This seems fairly open to discussion in a positive way, so I take the stance the mods seem to lately, which is "wait and see". We all have the tools to try to suppress the flames (or fan them, but that's where a little personal responsibility comes in) as needed.