As soon as you get into a medical school, you can expect every pre-med you have ever known to descend upon you like a hobo on a ham sandwich. They will want to know things like what your MCAT score was, what leadership experiences you have, and how many people you had to sleep with. It is flattering at first, but it quickly becomes irritating because all these people are just using you. If a long lost friend who you haven't thought about in years suddenly contacts you, make sure they are not looking for a copy of your AMCAS application before you let yourself get too excited.
Your pre-med friends will send you long emails with all sorts of information about themselves and ask you what you think their chances of getting into med school are. The best way to approach this situation is always to tell them the same thing: with a little more hard work, they would pretty much be the perfect candidate. Be wary of going into any details in your reply, because the more details you go into, the more likely they are to email you for more information. Also be sure to wait a few hours or even days before you reply so they think you actually read what they wrote. If they do email you again, just tell them that you're a little too busy right now, and ask them to email you again in a few weeks. Pre-meds have a very short attention span, and so they will likely forget that the encounter ever happened.
While it would be easy to get angry at those who contact you, remember that there was once a time when you used to do these same annoying things. Suck it up and at least give them the courtesy of a response before you go back to doing something more important.