Hmmm....so, let me ask a follow up question. What has Thailand not joining a political bloc during the cold war got anything to do with economics today?
I was once stamped in for 30 days visa exempt when I have a valid ME Non O visa. I think it was because I wrote that I only wanted 8 days as I was flying out again to India. As Robert says, it might be up to the IO. But def. put number of days as one. Maybe it was an error I don't know. But also don't put your visa number on the TM6 it might trick them in to giving you a visa exempt entry if your passport allows it.
They can track my wife as much as they want. Maybe they can give me a report on where she is if I lose her. It is for Thai householder so I don't think they can track me any more than they can just turn up at the address if they want to.