Auto-kick or alert when members speak with non-emoji

[patcon]

This is maybe something that should be left to other members to do (as opposed to being automated), but maybe the bot could react with "😬" to emphasize that it happened and make ppl less likely to let it slide (esp since there are some odd edge-cases where text-ish things will be in messages)

Things that are ok:

• emoji
• @mentions
• images/memes
• google map urls
• addresses (in dropped pins)