Does anyone know if this filter-thing has been introduced due to some laws and requlations or if it is 'just' an UBI-specific requirement?
Maybe it would be sufficient if the filter can be disabled only with some kind of 'special knowledge' like adding a certain registry key, adding a setting to a configuration file or something like that?
I know that those mechanisms are used to 'bypass' regulations on other products and as long as the solution is not obvious to the 'normal' user, I don't see a reason why this shouldn't be also a valid approach for this game. The filter will be enabled all the time, it can't be disabled by 'accident', but the user would still have the possibility to change this.
If it then would come to a law suit, UBI could argue that the game has been modified using 'special hacker experience' and so the case could be closed

I guess you can't be sued if you deliver software with undocument features/parameters and then someone smart starts using them, right?
Btw, I'm still looking forward to my preordered CE which should arrive next week - although it will cost a small fortune here in Germany (about 70€). If this helps to support Oleg and his team (which made an amazing job) and to keep the IL2-series alive, that's a price I'm willing to pay