There is a low chance to legally arrest the scammer but there are ways to prevent from being scammed. The wallets used on the purchasing are anonymous so there is a low chance to identify them and also most of the time the names of the founder are fake names so it is really hard to identify without much evidence. Preventing investing is the best way for those thirsty moneybags won't get money anymore just by doing some research on the ICO's background. You can use reverse search on the images on there post on the team and mostly scam ICOs are only using google'd images for their team and it is one sign that it is a scam. If we have a movement on cancelling those ICOs and shared their shady actions to those naive investors then it could be a great help to get rid of them on the crypto scene.