Scammers are actually smart else they cannot get even a single penny from anyone's wallet, its we who need to be more smart than scammers. I think with the evolution of IEO scam projects have been controlled a bit but it still need more filtration. As mentioned somewhere in this thread that scammers are now hiring a good team and even investing on their marketing part to lure more and more investors so it is difficult to identify them in the beginning there must developed something to filter such scam projects, the crypto community really needs to do something for it.