Abduct population inside civlian ships

When a ship with population passes by, we can only choose to either shoot them down or let them pass. 

So how about blockading them on their route will allow you to take them for yourself? In this case you would blockade an incoming civilian ship and then this will fly automatically to your nearest system, adding the population to your system.  This could go hand in hand with additional diplomatic options, choosing to not take hostages or free them, or maybe even exchange hostage population. 

Obviously this would also be a new way of gaining different kinds of population, which is especially useful for factions like Cravers or Horatio.