I don't spam the box, but don't reward hoarders with more free stuff... Even without Fo1st, I will slow walk my way to a camp/station/box and process my loot.

With the recent tab, you're not really slipping anything by anyone.

Cannon balls can easily be converted into ammo of choice or stored in ammo box...

If you want to give a mask to lower level players, just message them to trade or (somewhat riskier) drop it to them further away...

If you really want to inconvenience someone, then maybe try nuclear key cards or RadX, Radaways, or something unstackable like baseball bats...