Starting experiment:
Hello, mister aggro insane elf in christmas vacation.
its high level aggro, so even if push fails, you can flee, come back and heal him up.
[x] can push aggro mob outside area

"An insane elf seems unable to go south."
[x] cant push inside some areas

looks like some areas have some flag that protects them from pushing mobs from outside

[x] can push mobs from one continent to another (anyway, its just pushing from one zone to another)

side note: you can wrench mob, but they will no longer have aggro flag after that
working as intended, i think

[x] insane elf it at wildwood entrance right now
mob is still "angry"
now i just need to wait for someone, i will stand here and heal player/kill mob

shit shit oh shit i forgot about mob
[15 May 03:36:09] INFO: You hear a loud scream as Dioto is brutally killed by an insane elf.
[15 May 03:36:33] INFO: The last post plays mournfully as Labview falls in battle to an insane elf.
[15 May 03:38:07] INFO: Stendarr cries tears of Anguish as Griswitch is slain by an insane elf!
[15 May 03:40:04] INFO: The last post plays mournfully as Labview falls in battle to an insane elf.

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tl/dr
you can push aggro high-level mobs from one area to another
how to fix:
-some areas already have restrictions so you cant push mob from outside, just add this thing to every area
-remove push skill
-add rule "its forbidden to push aggro mobs"