I think that it just comes down to maturity.
If you have to ignore another member, then you should show initiative and not stoop to there level, don't neg them for stupid reasons.
I see it as if you don't wanna read what they have to say then that should also apply to either negging them or greening them.
In the end if your that determined to neg/green another member then all you gotta do is click a few links and then you can do what you wanna

LFrog