I talked with our moderation/admin crew before this patch hit and we deemed this as acceptable. Both teams can do it and only a buggy/humvee can do it. Just because it wasn't in old Ren, doesn't mean it shouldn't be in Ren-X. If that were the case, many other strategies would be considered exploits as well.
In the future, if you have questions/issues with our server rules, please post on our community forums.
http://constructivetyranny.com