Excluding individual observers is pretty easy, though if the list of observers you want to exclude becomes long, then so will the URL you have to use.
You can apply all kinds of filters by editing the URL. I have a URL bookmarked for my identification sessions. It includes a number of filtering criteria that make my life easier. Among the things I exclude are a number of observers who have annoyed me over the years, a project that tends to generate a lot of “junk” observations, as well as observations that don’t meet a number of (my) other criteria for being “useful” .
It’s pretty easy to figure out whether you’re doing it right or not. I find that most of the time if I get it wrong, it has no effect (ie. the observations I’m trying to exclude are still there on the identify page). So I keep trying until I see that the observations I want to exclude are not showing up on my Identify screen.
I’m in this situation, except I didn’t tell the identifier about it. Someone suddenly adding a lot of IDs, first only to confirm research grade observations/IDs, so not really a problem for me if they just want to raise their ID stats, but then also disagreeing with VR IDs (and guides tells me you need a microscope to ID at a species level)…
Is it OK to just block them to prevent this “issue”, and how will they be informed from this ban, do they get a notification, or just don’t see your observations anymore?
I would try to engage with them politely to start by asking them the rationale for their disagreeing IDs and presenting your rationale. This is the most constructive approach, as, if the IDer is incorrect, they can withdrawal or change their incorrect IDs and then not make more going forward.
If they don’t engage, or continue to ID incorrectly, I think you can block them. They will not receive a notification of being blocked.