Gee, the old crewroom antics of second guessing legalese!
Undoubtedly the vacating of running helicopters is allowed in some places, not in others. Certainly we've been here before in discussing it, and the Antipodes allows pilots to leave a running helicopter under certain conditions including skid only, lockable flying controls and required for safety reasons. Never seen or heard of it being a serious issue when complied with under those terms.