i think slagging off your own is your right, but when someone else does it then its not so funny.
I will slag off Singaporeans with other guys with Singaporean partners but would take offence if someone else did it.
I might even take offence at some foreigner slagging off the British royal family even though I don't think much of them myself.
anyway I wouldn't take the piss out of Thais on this forum. whats the point when the posters themselves provide so many great [iss taking opportunities?