Wall hackers in Wintergrasp

Greetings, sorry for english. I saw them going through the gate, walls and ceiling of wintergrasp to access the Raid area without portal in 3.3.5x100.

https://www.youtube.com/watch?v=XAZY3yG_las

https://www.youtube.com/watch?v=cu5JEjSIoQw

thank you for your attention

You can get there through the texture hole.