Gay Boy Thailand

I have heard some half-baked warnings about extortion of gay men in Malaysia, where sex between males is illegal, and this is a call for specific information. If you know, could you please respond to this post?

At Utopia-Asia info on some Malaysian crusing spots says “beware of decoys”, but nothing more. Who are the decoys? How does the blackmail work? Is it about getting caught for having sex in public or is it in private too?

One reader wrote in a comment that he knew several gay foreigners who had been blackmailed for money in Malaysia. By who? How?