Quoted from the Siege Rules
To avoid being disciplined for this, use ladders in the way they were meant to be used, up against the walls.Sadly, about the ladder that makes you go "through" the ceiling, nothing has really been defined for Siege. On 100, Exploiting a bug to gain advantage is prohibited, but these rules only apply on 100 so far (changes to come).
I didn't really like seeing you guys using that glitch on the siege map, but like you brought up, you said Nindurr tolerated it or some other admins .. since it's not precisely define in the rules, I couldn't do much about it.
The 100 server is being annexed to the other NA servers, so rules will be updated for all servers and we'll bring that matter to Nindurr or Gash so it is dealt with in a descent time frame.
I honestly dropping a ladder to get off the wall makes it very hard for Defender as they probably are defending the stairs going down to ground level, and it usually gives direct access to attackers to the flag or give a very huge advantage. This said, it is a very clever idea and in real life, it is doable to drop a ladder to get down faster... it is the defenders job to destroy that ladder ASAP, so I don't see anything wrong with it, but I don't make the rules, I enforce them
(Just stating my opinion and where I stand about those ladders). If the ladder doesn't touch the ground, then there's a problem though, it has to look like if it was "dropped" there and it ends it's "deployement" when reaching the ground. A straight ladder where you have to "drop" or jump off because it's not touching the ground, this I wouldn't really like to tolerate as it defeats gravity/ nature laws
Thanks for being patient, we'll update the rules asap