Aren't the brightest bunch are they?
It's like a script isn't it? Something picked up from the daily mail or another equivalent hate-rag, to shout at people who have the audacity to care about someone other than themselves. It appears to give the user a sense of superiority over someone, when they are just throwing words they like the sound of because they've seen it used to bully others before.
I find it often ties in with people who use multiple exclamation marks after a space. !!!
(Honestly, have a look for the multiple exclamation marks after a space. It's almost poetic.)
I know I probably ABU, but the level of stupidity on this planet at the moment baffles me.