Nostalrius Begins - Quality wow vanilla realm (1.12)

Hello!

I know the rules of this server is pretty strict so I'm wondering if it is breaking the rules or a bannable offense to be logged into two accounts at once, one character questing and the other one using just sitting in a capital and using the trade chat or the lfg chat for dungeons while your main is out and questing?

Strictly speaking it is not allowed (unless it is your banker).

In reality I don't see any problem with that unless the character is another faction than your main.