I saw a Lemmy user give ‘benefit of the doubt’ responses for seemingly curt comments, and then original commenter thanks them instead of feeling attacked. Bizarre to me. I feel like that happened on Reddit more often at some point, even for most non-specific communities, but I haven’t seen it since.
If it’s in the past hour it’s just one spammer, and it happens occasionally. If you block the user, you block all their comments in other posts.