There must be some kind of ratings website for all services related to cryptocurrency. As cryptocurrency market is not regulated at the moment,it is very easy to cheat people ,to get their money and leave. With a site listing rating or reputation of services around cryptocurrency people would understand which service to trust and which service not to trust.
There are lots of well known exchanges out there like bittrex, binance, poloniex, etc but unfortunately when a coin or token first come out it normally starts at an exchange which is not well known.
We just have to be more vigilant when dealing with the not so popular exchanges.