I don't dislike the idea of loans (except for my own loans irl

)
I just think stuff like loansharking, job recruitment, tolls, paid bodyguards and stuff like that depend more on player culture than on code. Everything to do that stuff is pretty much there already, just need some players to actually start those habits. Then it's easier to assess what is needed code-wise.
If you want to be a loanshark and then do somewhat mean things to people if they don't pay up in the agreed amount of time, go right ahead. There's a lot of valuable junk floating around in space, you could start your own loan shark agency after a bit of scrap salvaging or smuggling work.
If the station command staff or guards want to put wanted posters around on the bulletin boards and issue bounties against known criminals, neat. Just go do it, and if enough people see what you are doing and think it looks fun, it'll catch on.
If it's anything you think might generate angry adminhelps, it'd be nice to send a message our way so we'll know what's up ahead of time.