I just read the thread Should chat have TeX support? and I would like to ask: what is the purpose of the chat? Is it fully off-topic, off-topic but math related, or can you even ask small questions there?
I believe that I speak for the rest of the chat regulars, it is generally fine to talk about whatever you want (as long as you're playing nice with others).
Two important rules about that, I'd think:
Feel the conversation, don't just drop in and interrupt - people might be discussing something already, wait a minute or two and read the backlog. This will help you get the feel whether or not it is a good time to ask your question. Worst case you can always mix into the conversation and slowly divert it to your question.
Never ever ever ever ever behave like someone who is so anxious to get an answer so he asks every single person showing activity and pinging anyone. There is nothing worse than such behavior on a chat. If you don't believe me, just try to think about what it would look like in real life.
Beyond these two rules of thumb, feel free to join in and chat about your question. It is unlikely that you will lose your thumbs if you keep the rules.