Re: Aikido for all or one...
I'm with Phi, I would walk out. I was blessed with a main aikido teacher who encourage us to try as many different teachers as possible, even different arts. One reason a teacher or organization might have to limit outside training or cross-training is to protect a certain organizational or dojo standard... but IME the main motivator is usually just political. It's good to have and protect a minimum technical standard; however by limiting exposure you will most likely end up with close-minded students with too limited a skillset unable to operate outside their paradigm, and this is particularly dangerous in an art without universal standards like aikido. The founder and most of his direct students cross-trained to some degree, it seems disingenuous and egotistical to limit the student and art growth by imposing limitations in this regard.