Postsemgirl-
it does not matter if not EVERY girl shrieks or not, the fact is that some (or even most) do, and they are wrong. As far as the coffee room and talking to members of the opposite gender, I do hear your point but there is one small difference. Im sure this has been said a million times but if you text s/o there is a very likely chance that you know them on some sort of personal level ( their name, number and so on) making it more personal, while here it is completely (and rightly so) anonymous.
Another point- people who have addictive personalities and have a cell and can text, surf or do whatever else are just setting themselves to become hoplessly hooked. In todays world of modern technology we are ironically staying in touch more and communicating less.