But you are missing the point though. I'm not saying bad people won't give bad advice, on the contrary I see that daily. What I am saying is that there is no reason to blow this out of proportion as many posters on this topic have been. You worry about bad players teaching bad habits, why don't you start a linkshell and run content/teach basics and enforce the good habits instead? Why is it so important that you don't meet requirements for this system exactly? Because lets face it, THAT is what most of the complaints about mentor system are on these forums right now. That certain players don't meet the requirements. (which are in fact too easy to reach, especially with the way people farmed commendations just to get glamour rewards)
There is no good way to handle it, one way would dictate people need to take a test, but it would be less than two hours after the content was released before all variants of the questions had answers posted on a list somewhere on the internet, then inexperienced/bad players would still be part of the system. This way people have to show they actually have played the game enough to achieve three requirements, but again it doesn't gate bad players from it. They could gate it behind top tier raids, but then the population ratio for mentors/students would be so skewed, and the top tier raiders aren't exactly known to be 'kind' to those they criticize. What do YOU think these requirements to be in this system should be?
TL;DR If you are a kind, helpful person you will help others with/without a mentor title. And there is no feasible way to make this system work that won't have a flaw. But it isn't about the system or rewards, it's about HELPING people.
