Actually it might be a fun feature of the expansion. In Legion if we tresspassed into the Order Hall different than our class, each one of them displayed their own way of removing the uninvited visitors.
If you tresspassed into Druid area, you fell asleep and woke up outside of their order hall.
If you flown into Acherus, you would be bound with phantasmal chains to an undead gryphon that would carry you all the way back to Dalaran.
And if you found yourself in Truseshot Lodge, then a great eagle would snatch you away from the ground and leave you stranded on some mountain peak away from the Order Hall.
Imagine if a similar concept was applied to the Horde only part of Silvermoon. You would be stunned by the guards and a blood elven magister would arrive, mark you with a 10 min debuff and then teleport you out of the restricted area back to the sanctuary zone.
If you tresspassed again while having that debuff, then you would get killed by the guards, no questions asked. And through various of methods, either guards would gank you, a silent arrow would strike you in the back by a vigilant archer, or just outright you would be fireballed by another magister.
Same thing would apply if you were flying over the restricted area of Silvermoon. A timer would start giving you a moment to leave it. If it runs out and you still are flying over Horde zone, a Dragonhawk Rider flies by and puts you in a magical lasso.
The one that Dragonhawk Riders use in Warcraft 3. And then drags you midair back to Sanctuary zone, applying the same debuff on you. If you fly over again with debuff still active you get shot down by immediately.
In both cases when you are killed, your body is then taken to a trash heap, serving as a cemetary where you can release your spirit and respawn.