Nicknames do tend to point out perceived weaknesses, yes. But there is a huge difference between banter and bullying.

Sadly, there are a few people who don't understand this and therefore are quick to point out issues with it. I get involved in safeguarding of vulnerable adults and am dismayed to see nicknames having a legitimate entry in examples of abuse. Like everything, yes and no in context. The GROLIES (another one, work it out if you must know) seem to be allergic to bonding and banter, so human nature is demonised.

What a sad old world we live in...