No, you can have a horde and a alliance character on the same account and the same server
I have a Night Elf (alliance) and a Undead (Horde) on my same account and i havent had a problem yet.
The community on Guild Wars isnt that impressive because since it is free most peoiple just want to get on and mess around, and since it is so much smaller it is not that fun. I would reccommend World of Warcraft. The community is much better and yo…