Good morning,
I can tell that Shenyen has never played Hib.

1. Shrooming into the Lord Room was fixed over a year ago.
All other windows are freely accessible to the misters.
2. Only Maglan/Golani can answer that.
If he was really being punished, it wasn't allowed.
3. If the ench and the pet are attacked, the guards must be killed first.
4. Unfortunately, we and the mids can't use siege weapons for anything else.
5. In the short video that follows you see someone else doing this.

Keeps are being captured properly again for a long time since we have enough people and it is the only way for Hib/Mid to capture a keep. But that will change again and the albs will dominate again.
The only exceptions are Crim/Nott and Eras.

Again, only Abydos can answer whether it's legal or not.

The relic guards are not supposed to attack pets. they only do if they are targeting the owner at first. And this is pretty clear why: Pet could be sent in any relic keep taking all guards agro leaving time to owners or other to go upstairs and grab them.
For other keep is know that sending a pet trough a keep will take some sort of agro sometime, only of CY guards tho for what i know. Sometime i used to get arrows on pet from archers, but is random.
You're right, only Abydos can answer that, even tho i think is regular and asking to take action for such stupid stuff is imo a bit too much.
It's not bugbusing if things are designed that way.

Don't worry. The answer is to remove all players and recode them for three years. Maybe then the dev's will have solved it all.

This happens to all pets, seems guards mostly ignore pets. I recall a certain BD doing this a few years ago and the forum lit up with flaming. Generally pets are broken, charmed ones don't obey the casting rules when it comes to LOS checks and immunity timers, IE: there is no timer for the charmed mob. It is what it is. Seems to be a feature on some free shards.