@zeni.eth
hope that it starts light and gets progressively stricter only as the system gets better
want to avoid a chilling effect where users are scared of interacting with larger accounts even if they're posting quality replies
fwiw, I think about and write my replies to you and dan carefully, but don't expect (or receive) interaction most of the time. I'm not personally concerned about a spam label, but it would be sad for a new user to try and do something similar with {insert whatever popular user who's interesting but doesn't reply that often} and get marked.
Might also want to consider if their replies generate sub-conversations that don't involve the original caster.