I think from now on I will print a copy of the oneworld rules and keep it with me when I am faced with the checkin and lounge Dragons!

Welcome at oneworld alliance partners' airport lounges, including Business Class lounges, regardless of what class you fly that day. You can also bring one guest with you.
Priority check-in at Business Class counters, regardless of class you're flying that day.
Preferred boarding at your convenience, regardless of class of travel.
Preferred seating.
Priority standby and waitlisting.
http://www.oneworld.com/satellite/tier.cfm