If Sudbury didn't teach them anything, here are just two of the lessons Liberals need to learn:

Provincial vs Federal is moot; it's all the same party, all the same tactics, all the same shadiness.
Get everything on record.  Record everything.  They are using the same excuses in this story (oh we had a talk but it was a courtesy call and nothing untoward was discussed) as they did in the Sudbury by-election but this time they'll get away with it because there isn't any proof.  

Side tangent: it behooves politicians to avoid tangible records; there is no difference between this Liberal shadiness and Clinton's recent campaign south of the border.  They're all liars and thieves and that goes for the Libs and Dems as much as the Cons and the Repubs or the Greens and the Indies.