It's because everyone knows the A's are A's, so they don't have any problem being nice, sharing tips, helping others along. The B's are trying to become A's. M

It's because everyone knows the A's are A's, so they don't have any problem being nice, sharing tips, helping others along. The B's are trying to become A's. Maybe they even think they're better than the A's, but their skill isn't acknowledged. The last thing they need is some dumb C coming up and competing with them as another B. Better to kick the C's to the curb. Meanwhile the A's don't care, they're on top, after all, and life is good - let me share that blog post on clean code I saw the other day to my team's channel.