I was quite unsure where to post this, but i guess this could be considered an exploit:
Any character level 74 or below will do. I'm not sure about 75-79. 80 will not work.
Your faction will need to have WG.
1.) Go through the WG portal in Dalaran.
2.) Wait for the battle to start.
3.) You'll get ported into Icecrown to a mountain near Icecrown citadel because your level is to low to attend WG.