I came across a low quality answer today on a certain exchange, so I downvoted and flagged it as VLQ, then moved on. The next question I saw on the same site also had a low quality answer by the same user, so I downvoted/flagged that one too. Since I came across them both naturally, I am confident that's ok.
However, I noticed both answers had been given within the last few hours. This made me curious if this user was on an active spree of low quality answers. So I checked their profile to see if that was the case, and sure enough they had 6 answers within the last hour, all negative.
6 rapidly posted and poorly received answers are a pretty good sign a moderator might need to get involved. To see if that was the case, I pulled them all up in separate tabs, and found none of them were spam or abusive; they were all just low quality answers. No need for moderator intervention then.
So I downvoted/flagged one of them, then realized this exactly fits the definition of serial voting/flagging. That's precisely what it is.
The problem is, I was looking at 6 answers which all deserved to be flagged (in my opinion). However, since I'd more or less targeted this user, I feel I can't take any actions about it. Is that the case? Once you go to a user's profile, should you effectively recuse yourself from their posts?
What's the correct course of action after discovering many low quality but well intentioned answers from a single user?