What a shame... of course, I can understand the necessity to have boundaries in relationships with clients (a must in all fields of work, anyway), but turning back on someone who took the valuable time to teach and even support 'em?
That is an embarassment to the interpreting industry. No wonder some peeps run away from some ASL students. It's not nice being a tool or a joyride, and then be treated like someone else's unwanted cousin or embarassing secret.