The snowball griefing era has come to a close
Regular snowballs will no longer knockdown groupmates in the battlegrounds. Why? Well, with forced grouping, Blizzard doesn't want you to get stuck with a team-hating type who will constantly knock you on your butt via a well-placed snowball. Hardpacked snowballs may now only be used against the enemy. This should hopefully stop the griefing, which was apparently pretty annoying for those trying to rack up some honor. I can't think of many people being too unhappy with these changes, unless they enjoyed the thrill of annoying their teammates. Actually, there is quite the spirited discussion in the hotfix thread in the forums, as some folks will dearly miss those snowballs.