With lax penalties, recidivism is not unexpected. All you can do is protect yourself with the proper comprehensive insurance (theft & fire).
You can also try: https://www.reddit.com/r/toronto
I've got a favor to ask from you kind people... Please share my Facebook post, so to let everyone else know and remind them to be more careful in securing their bikes. Thanks and I really appreciate it!
https://www.facebook.com/nadavid/posts/10153177206763184
That doesn't make it impossible either. I remember a couple posts last year of bikes being stolen from a secure parking garage.