Hi @schattenjaeger, this is your first post I read and I found it interesting.
In my opinion "my post my rules" would apply perfectly to your post and would be a perfect rule for everyone.
You can not ban bot or spam in advance, but cleaning your posts comments you'd do a service to real reader.
Sometimes users comment with a bunch of emoji or with one or two words only. It is up to you as moderator to decide who you prefer as reader.
Bye