I will freely admit that I have never been to pattaya so I may be speaking out of hand. But i have been mongering and living in places more dangerous than Thailand. New Orleans, Washington DC, Seoul Manilla etc.
I have found that staying out of trouble, and danger believe me there is a difference, are easy if you are smart.
1) Go down with a friend or 2 or 12 and stay with them! Dont go wandering the streets at night by yourself especially if you dont know the area.
2) keep your wallet in your front pocket!
3) like everyone has said dont advertise your wealth
4) SHUT THE FUCK UP AND LEAVE THE LOCAL ALONE!!! I dont mean to say that thais arent friendly becayse in general they are a wonderful people and very gracious, but if they dont want to be botherd with you leave it. Go about your business. I use to live in a tourist town and nothing gave me and my friends more pleasure than kicking the shit out of tourist that came into town thinking they are king shit. this goes especially for Americans SHUT THE FUCK UP!!
5) other than that wrap ur dick and you'll be just fine