A Klingon can hop into the DSE's in Pi Canis though. You can't shoot anything, but you can provide healing to your NPC brothers engaged in glorious combat.
I find this sad and provacitive all at the same time. Imagine if the Devs gave us the ability to PvP in a DSE?
Simply put a marker on the outside (when system is moused over) that lets you know what faction and how many pvp'er are in that particular DSE so players can avoid it if they want to.