Flag supported.
However, this is addressed to @Solosanz. I hope you get this message, mate. Please keep the thread to the reference topic open (don't lock it). You can not create a flag using a locked or self-moderated topic and this is by design, therefore, the topic shouldn't be locked as well after creating the flag
This is what the administrator said
You're supposed to use the link in the flag to link to a topic where the flag is explained in detail and people can discuss it, not to the topic where the person was scamming. For discussing the flag, selfmod or locked topics would not be ideal. If a topic doesn't already exist about a scam, create it yourself before creating the flag.