My answer is NO. Should teachers avoid teaching in Thailand: YES! So keep teaching in your home countries, earning 3 to 7 times more money, then come on over and don't even consider working. I read so much negativity about the Thais on this website, but I find the Thai world outside of the education sector to be completely different. The weather is great, the food is great (and cheap), the Thai ladies are quite nice, and my business dealings have been extremely pleasant.
Teaching here seems to be a "Catch 22" type of siuation. You now have to have some pretty specific credentials, but anyone with the required credentials would not be real satisfied working here. There is a large group that primarily wants to stay in Thailand. They realize the only way for them to do this, is to teach. They take 25K per month (often less) and last about three months. But, there is always another batch of naive TEFL certificate holders ready to take their place. Some folks seem to think they are going to be paid four times more than a Thai teacher, or policeman and be given an easy job----Dream on!
The school system I was working for in America had two openings. One for an SOL (Speaker of other Language) Instructor; 31.50 us per hour. The other was for SOL Program Coordinator; 35.50 us per hour.