It's too bad that every discussion of the Thai police has to turn to hate talk like this. I've been here 6 years, met quite a few of them and never had a adverse event with any of them. They also seem to be far less patronizing, annoying and petty than western police.Thailand is also far safer than most big cities in the USA, you're much less likely to be robbed, raped or murdered in Bangkok than Los Angeles or Detroit.
If you want to meet crooked cops, try Mexico, the cops there are every bit as bad as you describe.