I agree with this suggestion, though I think they can be abused this way: place resupply and take siege shields, and any narrow or even not that narrow passage can be blocked quite easily.
This way you can just limit it to battles.
Well, this is exactly what I dont want.
Right now it takes a single person 1 or 2 swings to destroy a siegeshield. You dont see people hacking down siegeshields because there is no need to. If you want it gone you can do so every second you wish anyway by just throwing in a swing as you walk by.
Even if you buff their HP by 600 %, 2 people can still down a siegeshield in what ? 3 or at most 4 swings each ? Which will increase their survivability from -none- to maybe 2 - 3 seconds. Spamming them isnt possible either since there is a count limit for deplayables of every kind. The time it takes to resupply siegeshields from a weapon rack would be still severly longer than you can destroy them.