You know, the primary people that don't recognize these bots are spammers. I've seen some of them reply to several of those posts (which tend to be different in content with randomized titles about Bitcoin dying), leading to the conclusion that they are generally unaware of these things even though they 'spend a lot of time' in that section (obviously not for the right reasons).
Don't recognise or don't care? I've said it before and I'll say it again: sig spammers either can't or won't read what they're replying to.
At all. I've even seen them reply to those word-salad diet pill ads. It's beyond ridiculous.
And that actually helps the moderation team a bit (a very little bit). See, a spambot's account and threads will always get deleted. ALWAYS. But before that happens, if any of those sig spammers who are using bots themselves or are just plain stupid happen to post on those spam threads, then they can also get marked and monitored by the mods afterwards. You can look at it as an unexpected upside to a very serious problem.