Here's a hilarious account of a myspace user creating a "worm" to give himself more friends. Basically, he wrote some code so that anyone who viewed his profile wold automatically add him as a friend. But that wasn't enough so he also made all their friends add him as a friend. Here's his results.
10/04, 12:34 pm: You have 73 friends.
1 hour later, 1:30 am: You have 73 friends and 1 friend request.
7 hours later, 8:35 am: You have 74 friends and 221 friend requests.
1 hour later, 9:30 am: You have 74 friends and 480 friend requests.
1 hour later, 10:30 am: You have 518 friends and 561 friend requests.
3 hours later, 1:30 pm: You have 2,503 friends and 6,373 friend requests.
5 hours later, 6:20 pm: I timidly go to my profile to view the friend requests. 2,503 friends. 917,084 friend requests.
I refresh three seconds later. 918,268. I refresh three seconds later. 919,664 (screenshot below). A few minutes later, I refresh. 1,005,831.