If was to go back for an O-A visa I would just get one here in case I had problems in the US. It probably costs next to nothing and there is nothing wrong with having too much documentation. Good idea.
I believe Bangkok Expats or Bangkok Informed has organized with several different sections like real estate, jobs, etc. it concentrates certain topics to sections and frees up the main discussion thread. You would have to talk to the moderator to ask how successful it is.