TL0 members can’t flag posts in public topics, but they can flag posts in PMs. However, the “something else” option doesn’t work as expected for TL0 members. (Discovered on our forum, Discourse 1.9.0.beta1 and confirmed on latest, Discourse 1.9.0.beta12.)
Steps to reproduce:
Send a message to a TL0 member.
TL0 member flags that post, chooses “something else” and writes an explanation.
The flag will appear like any other custom flag.
The flag is created, but the message is not sent, and no dialogue is created.
The two flags raised by SpareBear (TL0) show no message, even though one was entered, and there is no “Reply” button. The flag raised by SuperTed (TL2) functions as expected.