I agree with this, Although this post may not be totally helpful but there are some things I learned from this. Just like what you've said there are some projects that looks very professionals, all the information was written, perfect whitepaper but ended up being a scam.
In investment the risk is always present so all we have to do is to be responsible in every investments/actions we're going to make.
Yeah, you have a point every investments are risky, although you know that person by the information in the internet but you still dont know its real identity, so if I were on you just be smart on picking where you will invest your money.