A lot of fuss about nothing. If someone wants to come along to a training ground and watch, so be it. If teams want to practise something that would give them an advantage, find an indoor facility which would be a bit more private. I'm pretty sure that this has been going on for years but probably a bit more discreetly. Be interested to see how many now openly pay a visit to Leeds future training sessions, the door has been widely opened!.
The only thing Bielsa would have learned is that a) Carson still loves Leeds & b) Derby are pretty shite.