As for slavery, not if you want to live. Bad enough smugerling to a interdicted world, but if you got cought as a slaver then it's the death sentence for sure.
Canon does not fully define what the Imperium thinks of as 'slavery'. It is quite possible that debt peonage does not count. Thus
"I'll lend you the Cr 8,000 you need for Middle Passage off of your world. The Interest rate is 10% monthly, compounded daily."
"I can't come up with that much money."
"Sure you can, I know a guy who runs a brothel...."
May be fine with the Imperium and the only problem is the 'Interdicted planet' issue.
It might be an interesting twist if worlds are interdicted but the people of the world are not. If they leave the planet they have the same rights as anyone else.
From JTAS 14 (Laws and Lawbreakers), Page 20 (High Justice).
The prosecutors of high courts of the Imperium concern themselves with crimes that would affect worlds in more than one subsector. These include the capture, transportation and possesion of slaves...
So, while is true that slavery is not fully deffined, as Peter says, it's also clear that is a High Justice crime in the imperium, so quite dangerous to be involved into.
Even so, I must agree those laws can be ambiguous at times and some form of covered slavery may be used and tolerated (as shown in Arrival Vengeance (MT), on the adventure Keepers of the Flame, IIRC. Sorry, I have not it handy and I cannot give exact page reference).