You can trust the people who's been responding so far. I've been living in Montréal for 5 years (I'm french, I'm used to petty crimes as I have been living in Paris)
I thought pickpockets didn't even exist in Montréal till last week, a friend of mine got her purse stolen in a café. It happens in every big city nowadays, we always have to be careful, but still it's way safer than Paris.
I live in a pretty sketch neighborhood, my street is called the "crackhead street" near berri uqam and even tho I don't feel threatened at all. No one ever offended me in this neighborhood even if weird people are hanging around there.
You'll be fine