User blog:RA2lover/Blocking - Resource denial

I've seen multiple players block off mithril entrances with walls.

Usually, these can be blown up by smart/resourceful players.

Today, i've made an experiment.

I've got mithril gear, blocked off Mainland's mithril area(to delay others' progress), then proceeded to blocking every single vein of sulphur in the game(making explosives impossible to create) by placing buildings on them, then blocked off  bento's cows by fencing them into buildings.

after that, i've went and killed everyone who had armor, and it took 5 hours(and a player who previously had sulphur without my knowledge emptying his inventory then leaving) to have someone with access to armor.

i've didn't block off the other mithril areas due to laziness(and as such players still had access to mithril weapons), but it can be rather effective if someone is willing to.

what are your experiences with blocking off things on the map with buildings?