Testing pings of users not involved in this post: @userf trichoplax‭ (the latter auto-completed; is that because of the answers?).

@userc does not auto-complete; does it ping?

That first comment pinged trichoplax (me), so yes it seems answering adds me to the pingable list.

Test comment from the thread page.

Test comment from the inline view.

Thread renamed from "Testing pings of users not involved in this post: @userf trichoplax‭ (the latter auto-completed; is that be..." to "Testing pings of users not involved in this post" by UserA‭