It seems that information about blocked users is only available via the GitHub UI . I can't find any method in the API returning this information.
Should we maintain a separate list of blocked users? That feels quite ugly...

Well, if it's not available then it's not available and we therefore have to rely on the GitHub API to do its thing. Best thing I could suggest is block a user on a test repo, have that user try to open an issue or comment on something, and see what the API kicks back.

@mbabker can you block me from the https://github.com/jtester/tests repo so we can test that?

It looks like only organizations are able to block users..
@zero-24 I transferred that test repo to an organization and blocked you ? Please try...

Not sure if the repo transfer leads to syncing errors since the url has changed - please report...

@elkuku can you try with your user that this error is not realted to the change to the organization?

OK I tried a different approach now.. please try again ?

looks like that it works as i get now a 403 error:

Well I think thats "it". So basically we "support" the blocked user feature...

Works for me.

@elkuku can you unblock me than ?

@zero-24 you have been unblocked ?

Thanks ?