the giving and getting of digits

today i had a class visit in which i showcased a variety of revolutionary war biographies. it went very well, except for the fact that none of the kids can ever remember to bring their library cards. this is rather annoying since after painstakingly researching revolutionary war titles and pulling them all from the shelves, i have to now put them all back. or to be more accurate, i have to make my page put them all back. anyway, while the class was in the program room, reading the books i had selected for them, a man came up to the desk.
man: is that a classroom in there?
me: no, it's a program room. we just have a class visiting.
man: you teach in there?
me: no, we have programs. like class visits, and homework help and crafts and stuff.
man: you're a teacher?
me: no. i'm a librarian. this is a library.
man: i was hoping you could tell me the benefits of getting a library card.
me: (starting to wonder if this guy is "for real") well, if you had a library card you could take out movies or music cds or books or magazines or use our computers. and it's all free as long as you return your items on time. (isn't the library grand?)
man: free? but how much does it cost to get a library card?
me: (chipper as can be) its free! you just have to return your items on time and you'll never have to pay for anything.
after a little convicing i am able to persuade him into getting a card. so he goes off to get a card and then returns a little while later.
man: i'd like to talk to you some more. ask you a few more questions.
me: (starting to get scared) okay.
man: no. (pause for creepy effect) i want to talk to you on the phone.
me: i don't think so.
man: why don't you give me your phone number.
me: absolutely not.
man: well, can i give you my number?
me: you can do what you want, but i'm not going to call you
man: (starting to write down his phone number) i think you'll change your mind
me: nah, i won't change my mind.
man: oh, i think i'll be hearing from you
me: not gonna happen
and i take the piece of scrap paper he wrote his number on and immediately throw it in the trash as he walks away.