Well, speaking from a personal experience, i dated a girl that used to be pro-Kataeb, and became pro-FPM later on...

i cant help it
I didnt speak with my parents for a month cos they voted in the 2000 elections and FPM was boycotting...
I guess being an FPMer is not a pre-requisite, but its a part of the package LOL...
I have friends from different parts of the political spectrum, and am up for a political debate anytime... However, most of the times we dont really discuss politics amongst us...