Here's how I see it from my perspective. Stronger walls should not be able to be destroyed by a character. A waste claim, battering ram, powder kegs, cannons or something to that effect should be the only way to get through the higher tier walls. Otherwise, what's really the point in the time and resources to build said walls, like the plank walls for example. Then raiders could still get into a place with less defenses and those that spend the time, resources, and effort to build higher tier walls should be better protected by getting some kind of warning.
So you still have the problem of transferring stuff elsewhere with a warning. First, no one seemed to care that you could do that exact thing in H&H when you see a ram. I know, this isn't H&H. Second, I'm not sure every single thing in Salem is going to be perfectly fair to both sides. Third, I'm sure there is a decent solution out there somewhere to transferring items elsewhere (not stopping all teleporting, not fair not to be able to buy resources in Boston because a waste claim/ram is up, not stopping people from logging off with inventory, just stupid). We can collectively come up with a decent solution. Make timers shorter maybe. Put thieving abilities in game that would allow thieves to jump walls and only carry out a limited amount in inventory and maybe a chest with a pulley, to avoid timers where item vaulting is possible.
Fact is higher tier walls and buildings should not be able to be easily destroyed. Higher HP or soak isn't enough. They should not be able to be destroyed by hand. Problem again is what is the solution?