Facebook almost killed Emilee Schmur's high school reunion.

The San Francisco resident and 2001 graduate of Aptos High was supposed to go to her 10-year reunion this month. Instead, it got postponed due to low ticket sales (a makeup date is pending).

"I definitely think (Facebook) made it redundant," Schmur says. "I've had a couple of classmates tell me they didn't buy tickets to ours because they feel like they already know what everyone is doing."