I believe that there is a certain amount of space that they can type rules into XM8. The rules do say that static missions can not be claimed (these missions can not be done with vehicles but is meant to be done as a team. The scanner and hotwire should be disabled. There is only so much space on XM8 for rules. Claiming missions in side chat is more of a heads up mainly, nice when people do it, but one also has to be aware of where people are at too.