So far, we have a captcha on account creation now and it seems to be working (from what I've seen, anyway)
It'll be a tough balancing act though. Relatively frictionless sign-up has been great for us, and anything that deals with bots will also affect that. Whatever else we may end up doing will need to be carefully considered.
Now that we have a mod team in place for The Agora, this is our next priority. We're working on some preliminary guidelines based on previous discussions/votes that we'll be discussing soon.
For now, just know that we share your concerns. We want everyone to feel represented here, not just a vocal minority.