MoP is there for the lazy. If you want convenience, buy a port?
Honestly, that sounds like a coding nightmare. Think about it. If you could randomly place zone ins/zone outs, don't you think it would have been done? That's akin to asking, "Hey, can I make it so when I zone into Athica, it puts me right at the bank?" It's a zone in.
How to do this: 1) Use random gateneck to random major city.I'd love to see "Ring of MoP" potions though.