Kayla, I'm sure you were not expecting half of GC to jump down your throat!
The fact is, though, that what you did could be construed as hazing - whether or not you intended it to be. The definition of hazing has gotten very broad in recent years. Even relatively innocuous things like requiring pledges to wear pledge pins at all times can be considered hazing because it separates the pledges from the actives.
I'm just saying be careful... next time your pledges are stressed out, have a spa night or something instead of scaring the living cr@p out of them.