I don't think this is about us. But I would have hospitalized you if you had started war on us.
Like it has been said by above posters. You have to pick a fight with people you can defend yourself against.
Yes it's possible to win in a gang war against people with higher level, but I wouldn't advice it, unless they are willing to take it lying down.
I have my thrills with PvP combat, having to spend Energy points on the right targets to stay under 50% so that other people doesn't hospitalize me, spending 100 000's of dollars on Stim's and Nimbus to try and stay a head, or to boost out of the hospital when your enemies aren't expecting it. Oh, and the tick hunting, you wouldn't believe how many people watches seconds in this game.
And when you declare war and beat one of these people, they just might take it personally.
So just level up, train up and become one of us