If there is such a large "army" of scammers, why not create an "army" that will fight them. This must be centralized, otherwise we may lose the cryptocurrency.

The question is who? anyone can create fake identity on internet so it's hard to trace them up unless if they show their real identity but i doubt there are scammers who do this since it's big wrong move for them if they choose to do this, and I think its impossible to make all centralized since this is not how crypto works so maybe the best thing we can do is to avoid what possible scam offered to us.
Scam is everywhere. God thanx now you've got a chance to read info, feedback from real people on the Internet, ask advice etc. MAKE YOUR OWN RESEARCH!
It's everywhere and it exist because of greed that's why we need to be vigilant always on what we do since the scammers will attack us if they see us falling on their traps.