There were an UNPRECEDENTED number of complaints about electoral irregularities arising out of the 2011 federal election. Call centres, in the pay of the Conservative Party of Canada, were (among other things) giving voters deliberately false information about polling stations moving to new locations. As part of their ridiculous, intelligence-insulting defence of themselves, Conservatives and their revolting supporters, are actually demanding that we produce evidence of anyone having not voted as a result of their fraud.
In the first place, these actions were CRIMES, the penalty for each of which is $5,000 and/or 5 years in prison. We don't have to prove that the criminal acts succeeded in their goals to make them illegal. Dumb-fucks.
In the second place, while it's interesting that so far nobody has come forward to say that they didn't vote due to the Conservatives' criminal behaviour, and while someone should definitely do a poll to establish whether or not anyone was discouraged by the Conservatives' crimes, let's consider this question: Do political parties ask people specifically whether they voted because of their campaign commercials or their phone calls? Or do they consult statistics and make inferences based on the correlation of poll results to campaign ads and such? If they do do that, are they being witless dupes, throwing money down the toilet?