I understand that men need a bit of “spreading” for comfort, but from the pics I’ve seen, this goes way beyond that. Just plain rude and inconsiderate.
Also, the further they sit with their legs spread wide apart, the more their long legs and feet stick out in the aisle - endangering passengers; both men and women.
Build a “manspread” gauge once the crucial angle of spread has been determined. Have man spread monitors on all trains going from man to man measuring their angle of spread. For those that exceed the maximum permissible angle, shoot them on sight.