Nice article and some great pictures. Banik ultras are quite notorious, mostly for their hatred against the Olympiakos of Czech football, Sparta Prague.
I am hoping to catch a Banik game when I will be visiting Ostrava later this year. Unfortunately it won't be in the stadium (Bazaly) where I grew up watching Banik, but at the renovated Mestsky Stadium, which used to be the home for the town rival Vitkovice FC.