The difference between a "hilarious prank" and "picking on someone" is whether or not the target thinks it's funny. Casey obviously did not find it funny, and people continuing to insist that it was funny seems so... dismissive of him. It's frustrating.

In any case, Ivy knows she upset Casey and she's sorry for it. Hopefully everyone can move on from this incident, but... we'll see during the next anon post, I suppose.