Last time I looked, Canada has a "zero tolerance" policy on wing contamination. In addition, to operate into Canada, any foreign carrier must have an Operations Specification awarded by the regulator (Transport Canada) which stipulates that the operator MUST abide by Canadian regs, which (if the statements are true) puts the Flight deck boys in the poo...you cannot avoid de icing if it has been brought to your attention by a qualified observer. In this case it would seem to be someone on the ground in Calgary, plus the cabin crew...maybe this so called law suit is a red herring to obfuscate any real evidence...you know, the ole baffle em with BS trick?