I've updated a little but don't feel like I swung my leg too far when hit by the hammer. ;)
My mom can't communicate either. Maybe it's a mom thing.
Salty, acerbic - I was stretching the metaphor.
I am sure there is a difference between boldly expressing one's opinion and doing so acerbic-ly. I would like to think that sometimes I manage to stay in the first.
I agree it is preferable even when disagreeing not to be mean, not to lose some of the strength of your point by slinging mud and throwing fits. But I don't think it's necessary to outright "be nice."