learned not to open my mouth about financial stuff anymore upon hearing I was in financial trouble and not able to open a 2nd base a larger airline cut and pasted over me in my base.
I was struggling to learn in my small city by myself, now I have a larger airline with a very high CI sitting on my face.
From what I understand, if he is purposely trying to BK you based on hearing that you are a struggling new airline, that might be a rule violation that you could complain to the admins about...
but yes, in general it's probably not a good idea to post on the forums that you are having financial trouble (unless you think your competitors already know it, and it's become public information).
For example, one time I did post on the forums saying I was near BK, to ask for emergency mentoring--but in that case, I was so deep in the hole that keeping my financial trouble "secret" would not have saved me, whereas some expert advice might have (and eventually did) help me learn what I was doing wrong and how to fix it.