As a curator of a community, I have been dealing with such users and have to get downvoted for pointing out the copy pasted content and for asking to change the behavior.
As you mentioned rightly, it's always good to give a benefit of doubt to new users to point out the issue and asking them to correct it.
If that gets repeated, we don't have choice but asking for your intervention.
Luckily the downvotes won't be big enough to drain out the rewards for the content we post, but it's kind of bad smell to get a downvote is what I feel.
Thanks for whatever you guys do.