Hmmm a question

I understand games like Guild Wars and World of Warcraft are all server based...but I do that sometimes...there are "hacks" or "exploits" that are found out. Is it possible to "hack" games like these or even force an exploit?

Speed hacking is the only thing I've ever bothered to do with games like that.

My friend has tried to hack WoW many times and failed miserably at it... the only thing that you can do for sure is buy gold and silver

There are ways, but usually they are patched withing the first few beta test clients. Hacking WoW or Guild Wars will almost undoubtabley get you banned.