I can follow some exploding-heads user accounts on Mastodon but not others. Why is that? Is there some individual per user setting that governs whether accounts can be followed in Mastodon?

I tried to create a community but it didn't work. I filled in all the fields and pushed the creat button but nothing happened. What am I doing wrong? Must I be granted some permission for this?

I have been trying to crosspost from here to kbin.social and everything appears to proceed as expected on this instance but the posts never seem to show up on kbin.social.

Will down votes be coming back?