Gotta agree too, I'm not sure I would use the word "easy" though, as it sure is a simple rule to follow - be nice, continue to be nice, zero-tolerance for not nice behaviour - however, simple things are often the hardest to implement - as you gotta be drawing the line somewhere, which as was mentioned, if one thing slips through, a lot more could slip through - this seems to be a big misconception with society in large, lack of enforcement of an ideal, does not mean that the ideal doesn't matter and shouldn't be respected - that to me seems like the vehicle for these small things to slip through, and a lot of similarity of your original post - how can we make people feel empowered to act correctly when misfortune occurs instead of letting it slip by? be it a conference, a meetup, an IRC chat room, or any circumstance.
AwsSum has support for 26 Amazon Services and has been used in the Node.js community for over a year. They only have support for 4 services to start off with. Also, AwsSum is more akin to how Node.js does things, whereas theirs is more like browser code.
Keep being nice to each other at all times. At all times we'll be growing. Therefore at the end, we'll be nice to each other.
Don't let it slip, since one or two slips allow more.
Be nice, stay nice. :) It's a habit which can be kept.