Well, the upper level seats at Arrowhead would likely be the best place for you and your friends to sit based upon your comments. Most Chiefs fans I'm familiar with like to have fun, even rowdy fun, providing it's respectable towards fellow fans & rival fans...such as not instigating drama & fights that is, haha.
As long as it's apparent you're simply having rowdy old fashioned fun, you shouldn't have any conflicts. It's only those fans who become aggressive verbally or physically that find themselves in a jam with security or fellow fans. :)