Empire or Federation? Or maybe Alliance? Or even go and get friendly with an Independent? Or even head to an Anarchy System where anything goes and all the Pirates hang out! Even become one yourself!
Federation seems to be mainly about rules and laws, and if you do something wrong they don't seem to like it. If this dislike involves the Security Service they have a fairly simple way of dealing with it! IF you are still alive after all the shooting they then ask you what questions they should be asking you! Slaves are a no-no, but this seems to mean there is a thriving black market trade in them.
Remember, there are two types of slaves, those poor souls totally enslaved around many systems and traded by Pirates and dubious traders on the black market. The other type are the Imperial Slaves, already mentioned in the thread above. The two are NOT the same thing, or commodity!
This brings me onto the Empire, where they are fairly laise faire about your dealings, as long as it doesn't do too much to upset the balance of things. You can get on well with them if you help swing things towards the Empire. If you should acquire a bounty for any reason, just turn up at the local station in a timely fashion (within 24 hours of getting said bounty) and they are quite happy for you to pay it off! You can even progress in their Navy to Lord or even Baron!
Of course there is the Alliance too, but there are few of these and some are well scattered. But it is another way.