pointing fingers i think doesnt really make sense, even as you said it would have been Hero Party battles, but who can be sure it was not jsut a random merc who hasn't been on teamspeak and doing so without evil intent.
But if someone of the team becomes aware that a ladder would have been put "onto" their flags, i would say everyone should be free to destroy that to his best judgment. Ladders left, right infront or behind the spawn point or somewhere else on the battle field are traps, which can be avoided when the cav players communicate them.
Even if it is a random mercenary putting the ladders on the flags, it seems to be quite intentional since it's happened on more than one occasion now. Is it not the admins responsibility to be vigilant for these kinds of things? I'd say it is, but consider that there are either:
A. No admins during the battle
or
B. The admins are in Hero Party
there's nothing to be done about it. They can excuse themselves by saying they weren't in the area when it happened and didn't see it, but that really only works for Shik. Tydeus and Smoothrich could have easily spawned and seen it, and I'm pretty sure both of them are admins. So, here's my suggested list of improvements:
1. More admins to monitor battles.
2. Disable ladders on ground battles
3. Make any object that can be deployed break on impact with flags.
This way we can avoid drama, keep griefing out of the game and assure that there's no substitute for ladders.
EDIT:
I really dislike hypocrisy, however everyone is capable of it. Wouldn't it make sense if admins could do their job without calling people 'spergs' 'nerds' and other names? FCC and several others see ladders on flags during a hero party battle, they call it out, they're called conspiracists and sperglords. Immediately after that, the admins from Hero Party draw even wilder accusations about Kesh and his allies, essentially pointing at a mirror and calling it crazy.
tl;dr drama blablabla bloobloo QQ