ETA: thanks ladies. I'm the meanie teacher that took away their card passing. I'm just waiting to get angry emails from parents. They really were out of control from the moment they walked in today. I've been struggling to get through to them lately, and I hope that they now realize I mean what I say. Of course, even after I erased the activity from my schedule on the board, they still couldn't hold it together during math. I personally apologized to my few kids who weren't part of the problem. They said they understood.
And you know what? I had about 4 kids whose parents filled out the valentines for them!! In 2nd grade? Hell, my preschooler did her own cards, for 30 kids! Then I had some that didn't even fill them out- not even their own name! I have quite a group this year. SMH.