A person being in the same orientation group as you, remembering your name, and seeming "nice enough" might seem like good enough reasons to give them your phone number, but by the time you've realized the error of your ways, your phone will be so inundated with "sup?"s, "u eat?"s, and 38-minute-long voicemails about how much sambuca they pretended to drink last night, it wont even be capable of calling the police when the dogged dialer "just happens to be passing by" your dorm room and wants to know why you haven't answered them once since they accidentally sent you that picture that was totally supposed to go to their girlfriend and if you'd be interested in pledging a fraternity with them.