[Mobhack]

No

If a crew bails from a vehicle that is damaged but not destroyed then the points the player who inflicted the damage gets is guaranteed to be the damage points inflicted. I think its shown on the roster - not something I check often.

If he then kills the crew somehow, he is guaranteed the full value.
If he parks a unit in the abandoned vehicle or guns hex, it gets fully destroyed so guaranteed full credit of points.
If the crew bail but the unit is not destroyed at end game, if the crew's side control the battlefield (win basically) then only the damage gets credited. If the crews side did not win, the vehicle is shown as "destroyed" and full points are credited.

So the crew can sometimes hold the remaining value of the unit they bailed from. Thus it is worth the other side killing them, occupying abandoned units hexes etc.

If the crew are survivors of a destroyed unit, they have no points value other than perhaps a point or 2 for any men killed subsequently, and an extra kill marker if eliminated. But in a campaign game, they retain the destroyed units experience, kills etc so will get a new ride in the repair screen, but a fully dead unit (including crew) is a newbie. In a 2-human campaign game killing his veterans is worth the bother. The AI just gets fresh newbies in a regular campaign.

Its not really worth obsessing about exact details, just win the battle and you will get the points for any abandoned units that the other side did not re-crew.

Killing stray crews is a low priority task and you should focus on the live units.

Parking a unit in the same hex as enemy abandoned units to "make sure" of them is probably worth it, if it does not risk the parked friendly.