Looking back, the projects you thought were scams, because you knew their tactics and stayed cautious, didn't cause you much loss. Usually, it's those who seem to have a good background, high quality, and appear to have principles that cut the deepest and most thoroughly. Those big scythes all follow this pattern. Just like people who shout every day about wanting to cheat, but give up in no more than 3 minutes, then say they're not feeling well today.