When clicking the cross-post icon, a search box appears where you can select the community to cross-post to. It shows announcement communities that disallow posting. It allowed me to select [email protected]. But then when I clicked “create” it just goes to lunch and gives an endless spinner. That’s a really shitty behavior. The user has no idea why it’s hanging when in fact there should be no hangup at all.

I did not know [email protected] had restricted posting until I went there to see if I could post directly. The search dialog in the cross-posting form should print a prohibited icon or warning icon (⚠) next to communities where posts are impossible. This would show users there will be a problem but in a way that does not ignore the existence of those communities. And if they select such communities anyway, they should get a hard and fast proper error msg.