Someone has already been astroturing subs like r/programming with antiblackout AI generated spam. If they did it before they will do it again if migration starts having a major impact on the userbase.
Here are a few tips for spotting bots:
default usernames
accounts may be ~100 days old when the start posting at times, but are always completly inactive during this “aging”.
Post/comment history unrelated to the topic, if it exists is nearly always generic freekarma4you type posts or reposted memes.
In the case of using posts for astroturfing, or meme reposting, bots will often coment on each others posts, this is a good way to find a lot quickly.
Comments made are super repetitive, often using the exact same wording. (this might be less common/blatant with newer LLM based bots, but wad the case with the shitcoin astroturfing bots a while back)