TB traps that go on for 8+ hours are usually because people have assets and cars involved.
Cars are also key for protection during your teams insertion into a TB trap to break it.
Allowing the removal of cars, whilst still in TB, would resolve 2 issues.
#1. Players who accidentally get tripped up into an encounter with their car, and now have to fight x mob to escape
#2. Cars would be safely usable in TB, and this will encourage their use, and the ability to break TB traps
#3. Players wont get trolled for hours, because they can simply leave with their car and items.