Is pick pocketing with a magnet tied to a string a problem in Canada?

I live in the USA within 200 miles of the Canadian border and go to Canada now-and-then.

A couple of years ago I accidentally discovered most Canadian coins are magnetic. Including their one and two dollar coins. I E-mailed with the Canadian mint and they answered saying their coins are 95% steel.

One of my hobbies involves using a ring magnet on a length of string. I wonder; Do pickpockets go about Canadian cities using a magnet and string to do their thing.

At the time of my discovery; My circle of friends included about 3 Canadians, one of which made regular trips back-and-forth to Montreal, and they did not know this.

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