Originally Posted by
Curse 
First of all i didn't say i was meddling in his/her affairs all was asking was should they be working there, second is he/she tell me that they been having sex with underage students i didn't want to say that but now i have. as a lot of people know here is easy to hide your problems from your work place but this is something else.
Its a difficult one but I do agree with the other posters. What this person does in their work life is not really your business. The person will have colleagues and a boss who will surely will supervise/observe what the person is like in their working life.
But by asking should they be working there it implies you want people to say yes or no and then you would try and do something about it. What do you want out of this? Do you want to report them? Who would you report them to? I think you should also consider your own motives for reporting them and what you hope to gain from reporting them.