There is no longer a difference between 'war' and 'peaceful' . Which means you'll always be able to be declared on and you can always declare on others.
Being in a faction is all about war and hosps to gain respect (and tighten bonds with your fellow members). If you dislike this, perhaps being in a faction is not for you? You can also see it on the positive side: you get to use meds to gain the medical item merits. Other then that, you can train up to get stronger and one day it's you that might be able to attack others uncontested.
Oh. Thanks for the explination. It's just a faction with a few friends who are now inactive really . I was just staying for merits, but will probably disband.
You got all the merits now, so you won't lose out on anything by leaving :)
You should try joining an active chaining faction. It's a lot of fun chaining and you'll see whole another side of Torn. (The most fun aspect of Torn IMO)
Also, if you join one of the top factions, apart from serious wars which may happen once or twice every few months, no other faction will use you as a filler or hospitalise you.
Sell your faction dont just disband it. It hasnt many upgrades but is worth something to someone. If you have a lot of 'cannon fodder' in your faction ie players with weak stats people will war you on a regular basis. The only way to stop that is for you all to train your stats :P