What are Your Conditions to Commend?

[Nero]

Might someone be able to explain the reasoning behind why you won't give a commend to ppl who don't say "Hi" at the begining of a run?

Pretty much this:

Lack of courtesy, maybe?

I don't expect to have chat's, or long ass conversations in a Duty, but saying Hi/Hello and bye/thanks at the end, or w/e are basic manners.