There have been only five cases in which people making illegal border crossings were stopped by RCMP in Saskatchewan, one in Alberta and one in New Brunswick in the first three months of 2017. None have been recorded in Ontario.
Maybe because you would have to cross water, which means one of the 3 official bridges or one of the train bridges to get over to Ontario.
They must mean this year only though. Since there have been quite a few recorded trying to go over the train bridge and by boat that have been caught.