Better do your own research before you decided to join on ICO. You should read their whitepapper, team and roadmap criticaly. Because nobody can tell "this or that ICO is scam" before everything happened.
This is a good advice.
Do your due diligence, study the whitepaper and search on the internet for the team members. Imagine how the business will position in the market.
Then, you decide whether to participate or not.
Good luck.
Study on your own,that's the key. It's not good to rely on other's opinion alone. We can listen to them but we have our own mind to decide and it's our money were to risk. Better research so you will not regret.