i always use my brain when looking at ico's
there is always a few things that look like it is too good to be true. but when they start promising payouts or increases or plain out lie about some things that is when i know something is bad.
i also use Reddit as my main source of information. if you search you will more then likely find somebody else with an opinion.
Yes everybody should made his/her own decision when it comes to ICO investment, but review web-page are providing general picture, and they can help to make this decision.