I can't stand playing playing with anyone under the age of 15. This is for various reasons. 1) high pitched voices, that go even higher when yelling and ranting 2) the "me" attitude where everything is about them and they are never wring and it must be someone else's fault it failed 3) the entitlement issue. Where they expect they can be little retards and not have to participate and still get rewards 4) will not listen when given instructions 5)feel the need to swear because they think it make them cool There are others and these can be faults of people much older but I see them more and more from people under the age of 15. Now that doesn't mean that there aren't exceptions. However my rules have come down to be respectful and work with the team or get the boot.