There are more things to limit by diffrent expansion

[betayi]

like npcs in main city, with kinds of item not belong to this expansion
like the Darkmoon Faire

[jordigil]

• Disable TBC / WotLK Dungeons and Raids (at 58+ you can join TBC dungeons with the LFG too), rez at angel and reach Shattrath, same for Dalaran, 68 and join a WotLK dungeon...)
• Disable Mage Teleport and Portal to Shattrath / Dalaran

[FrancescoBorzi]

azerothcore/azerothcore-wotlk#5248