I have only barely used messenger. But who'd you send it to for it to even be reported in the first place or seen by a moderator?
It was really strange, I sent it to a friend, who upon sending it to via other means promptly thought it was hilarious and did not report anything.
Thats what they were going for, the head of Threads said they wanted to create a spin on the @ symbol
Exactly what i thought, they literally just redrew the @ symbol in a clockwise (& less satisfying) direction.