

I wouldn’t. Have to remember that a core component of trolling is making things up, so you should not take for granted that any mental illness is actually present. Imagine the troll as a 13 year old, smirking or giggling to themselves while they type. That’s the spirit these things are done in.
Anyway, bringing mental illness into it just insults people with actual mental illness, who generally behave much more maturely.
If you want to actually engage in any sort of positive way with a troll, you need to stoop to their level and draw out more engagement from them, without making it fun. We used to call this counter-trolling. Trolls trolling trolls trolling trolls trolling trolls … ad infinitum. This eats up some of their energy without giving them anything in return, as the time they spend engaging with you is time they can’t spend trolling other people, who might feed them more.
Or save yourself the time and just block and move on. That’s definitely the most mature thing to do.
The worst thing you can do is a short engagement that results in you acting like you’ve gotten upset and then disengaging. This is feeding them more things to giggle about. If you engage, you need to be willing to stay in it for as long as it takes to deprive them of that satisfaction. This can go for multiple days. I don’t really recommend it unless you also find the bantering process amusing.
Big yellow flame probably indicates its not getting enough air mixing with the fuel for complete combustion. I’m guessing something got clogged up with soot, or possibly rust. Look around at all the little holes the gas comes out of, see if any of them are clogged up. If you find some, something like a safety pin can probably get them opened up.