call that? What if the kid getting razzed doesn't say anything because that is just what these other kids want...a reaction. But they still hate it and want it to stop. Clearly if a kid is asking his Dad to skip school tomorrow because he doesn't want to face "razzing", it has gone a little far.
Call it thin-skin, call it being a little dramatic; but kids are mean and cross the line more often than not when it comes to "razzing"
As an adult, I don't particularly like acquaintances or casual fans talking to me after my team loses. I only take that from my friends and we usually follow the adage, "if everyone isn't laughing or enjoying the conversation, we don't do it".