So I read up on social circle game for college about how you build up a rep, the meet the hottest girls so you can work your way down, because if you kiss the 6s and 7s you cant work your way up in the same group.

So basicaly im gonna run this but ill be going home from college every few weekend, so when i go home and go out is it okay for me to just kiss whoever i like (s and 7s etc.) because it wont affect my social circle in college which is in a different city?

You can kiss whoever you want when you're home because the people at college either
1)Don't know it's happened
2)Don't know what she looks like.
As long as you're discrete about who you hook up with, it won't matter, this rule applies everywhere, especially within social circle game (although it's always better to work your way from the top down). If girls know your a guy that brags about getting lays then they'll have much higher LMR then a girl that knows that you've fucked half her group and never said anything about it.

Discretion is King!

You can't be serious man. You should do whatever you want to do, no what some book tells you. If you find a female attractive and have the opportunity to kiss her, do it, even if she isnt stunningly beautiful. If you find an arrogant 10 who is attracted to you, but you don't like her personality, deny her a kiss. Her looks don't allow her to deserve your attention, she has to have more.

It's is extremely important to have preferences in looks, but even more important to have a preference in personality.

Don't base what you do on what a book says. Some books give great advice which you should listen to closely, but not everything written should be so closely preceived. Perhaps this book did give you great advice in other areas, but that tactic does not sound to profound to me