I just finished watching the Voyager episode "Collective", and it made me wonder if it'll be possible to have cubes tractoring immobilized vessels into their internal hangar and stripping them for crew and resources/parts?

It could be implemented as a special weapon with a probability to succeed, depending on how big the targeted ship is and the ship that targets it.
For example, a sphere would've little problem with an Intrepid, but a Sovereign would most likely resist. A Tactical Cube should be able to assimilate even the largest ships, but the cooldown would have to be pretty long in order to compensate for it.
Also, while a Borg vessel is trying to tractor another into their hangar, it should be made vulnerable to attack...after all, its hangar bay doors will have to be open :p