On the subject of question banks, all the good ATPL ground schools have them for their students to study. Hell, you even get the 'confusers' for PPL etc. I dont see how a question bank could be deemed underhand when our 'customers' more than likely used them at some stage to get their ATPL's in the first place. TBH, I probably would never have passed my Air Law exam for my PPL had I not had the confuser
However, ATC is much the same...There are only a finite amount of questions that can be asked. For someone to put together a list of these questions to aid their study shows initiative.
Spamcan