As counter-intuitive as it may sound, have we left any of this user's recent answers alone long enough for him to come back the next day and see the negative attention?
For a few days now, I've been inspecting this user's new answers and flagging as appropriate, but that doesn't seem to be having an effect.
About the only things I can think of here to explain this are:
- This user does still care about contributing to various Salesforce communities, but isn't seeing our feedback because all of their answers are being flagged and deleted while they're sleeping.
- This user doesn't care about contributing any more, and is spamming to increase traffic/page rank for their own blog (or other blogs, or some other self-centric goal)
I'd suggest holding off on flagging these answers, and just downvoting for a couple of days (say, until 2019-4-6?) to gauge whether or not this user is still motivated by our internet points.
If there's no response or other indication of behavior change, then I don't think there's much we can do aside from downvoting, flagging, and deleting until the system imposes a ban.