I'm certainly missing something here but if someone kill himself to teleport in his base, how can he carry the loot with him (since when you die you loose your loot)?
He put his loot in a storage box high above him (usually in front of his base entrance, on top of a pillar). Then he suicides and got to his sleeping bag (which is inside his base). Then he just take the loot in this "buffer" box and put it inside his base.
If he wants to leave the base, he just fall from there (usually, those are 3 floors high, with no staircase to get there, and a barricade at the bottom to access the buffer box/fall on it when leaving the base).
I can't tell from the pictures but I haven an idea of how I would raid it. I have a base that is truly unraidable, I've given out dozens of charges to players that want to try to raid it.
Could you provide some screenshots?