I have noticed and we are all aware that so many people do complain that they were scammed through bitcoin. In every problem there is always a solution. How can we identify when a scammer is trying to scam.Let their be a strong system In such a way that scammers won’t be able to penetrate in. And can we pay more attention when someone complain about scammers.
We can't Stop scammers, yet we can avoid them.
And when it's case of dealing with someone through Bitcoin, we need to be extra cautious.
Moreover always try to deal through a middleman/escrow , it will help to save you from scams.
You can track a user through it's Bitcoin address, but if he's smart enough he will use mixer to mix his coins and become anonymous.
Nevertheless the only thing we can do is to remain attentive.