Nah. You aren't going to stop scams globally, although there are ways to prevent it. Such ways could be a watchdog system which identifies scams and lets the public know. Although, this is subjective and can lead to bias so would need trustworthy individuals running it. Honestly, though I don't think we need to babysit everyone and people will need to make their own mistakes and learn from them. I don't want to see anyone scammed but, it's simply impossible to stop.
Hopefully this watchdog system you are saying will also help especially those who are already obvious in showing or stabilizing their platforms. This public spread of information only shows integrity and safety among users which for me is essential.