They just don't exist like they do on Twitter. We do get spam bots now and then, but users report and block them quickly. They usually give up before the admin

They just don't exist like they do on Twitter. We do get spam bots now and then, but users report and block them quickly. They usually give up before the admin gets around to banning them. Each server individually isn't a great target for spam, since the populations are low, and there isn't a good way to spam outside of your server, because the entire instance can block you. Not foolproof in the least, but I haven't seen anything more than a dozen individual spam bots in the last two years.