It is really not easy to find out individual ICOs legit or scam. In my opinion, you must check their whitepaper, check team members profile info, telegram group or channel activity, see their adviser board.it is a very hard decision in investing ICOs. Do not think about what others people says,do your own research then you can find legit one beside the scam ICOs.
Indeed it is a very difficult task. It is necessary to carry out this study, which takes a lot of time and effort.
The most important thing is not to do rash actions, if there is even the slightest doubt in ico, then it is better to refuse to invest. There are almost no good ico at the moment.