I don't know how may times I have to go over it with our members here, but there is no "Rivalry," there is no "Competition," there is no "Feud" or "Bad Blood." The 501st is a very successful, long standing, separate independent organization who deserves only our mutual respect for the fact that we are also Costuming Fan Clubs.
Many of you posting in this thread might think you are doing so "All In Good Fun" or with no ill intention, however, it is an unpleasant fact that multiple times in the past 405th members have taken it upon themselves to take this "joke" to far and post mean spirited comments on 501st Garrison and Main Legion Social Media, said things to 501st members at convention up to and including saying to the face of 501st members "We'll trash your booth and crash your panels!" Threads like this can have unintended consequences like emboldening members to act in that fashion, which casts a poor light on all of our members.
I take the respectful treatment treatment of other Organizations very seriously, so while you might think you are just harmlessly joking around, I would advise you to take a moment and think about what you are posting and how it reflects on the 405th and how your words can be interpenetrated.