I was trying to interact with the account mentioned in the grekpak blog post here: https://blacksky.community/profile/did:plc:w4xbfzo7kqfes5zb7...

I can't comment, follow, like, or anything like that without getting the "Sign in or create your account to join the cookout!" popup. I wasn't trying to cause problems or get downvoted, this is just the the first non-BlueSky PDS I've ever come across and was curious to see the federation work.