Pay-per-trade brokers are incentivized to have you trade frequently and/or buy certain securities. RobinHood doesn't actually profit from each trade, so it could be argued that they have are likelier to care about the retail investor's long-term success (providing automated tools for monthly investments in low-fee funds, etc).
Regardless, let's give some love to the fact that people are accountable for their actions and the vast amount non-bad information on the internet. A beginning retail investor is one search away from a strategy that is a metric ton better than not investing at all (which is what most of them do): https://www.google.com/webhp?sourceid=chrome-instant&rlz=1C5...
If RobinHood causes some people to piss away their savings on crazy-risky investments, it's not because those people didn't have access to decent investment advice.