This happened to me after the Highway of Heroes Ride so I figure I'll share my ***** of an experience thus far.
I took pictures of my bike after the Highway of Heroes ride, but just before leaving the waterfront. The pics show my plate still on my bike. After leaving, I stopped off for some food on Queen St. and I'm pretty sure that's where my plate was stolen. Rode home not noticing the plate was gone, parked in the garage and noticed the missing plate a week later.
407 ETR
The lousy part is that I noticed the missing plate one week later, so any 407 charges in that week will be billed to me. And the 407, in true customer service fashion, won't register the plate as stolen until I provide them a police report (not just a report number) which is $5 and can take up to 30-days to get (you have to fill out an "FOI" form at the police department... FOI = Freedom of Information). Their excuse? "That way nobody can call the 407 and register a plate as stolen"... Which isn't much of an argument since I should be the only one with access to my account, and my plate is registered to my account... 407 is run by idiots. I did however convince them to re-run the plate with the MTO and when they do, they'll see that it's stolen.
Police
I needed to file a report with the police but without a vehicle, I had no way of getting to the station to file a report. They had an office call me to take my statement. I visited the station the following day and filled out the documents to get a copy of the report to provide the 407. The officers in attendance were not surprised at how much bulls#!t I have to go through to make the 407 Gods happy.
Ministry of Transportation
While at the police station, the attendant behind the desk filled out the MTO form and handed it to me. With the form, I went to the MTO office for a new plate ($20... NOT free). I didn't have to re-pay registration since I'm currently registered until my birthday. You will need this form, your ownership (which was in my motorcycle jacket which I tend not to wear while driving a vehicle), and your insurance (or company / policy #). I didn't have a copy of the ownership, so I had them re-print it ($10... cheaper than heading home to get it, and waiting in line again). So now I have a new plate but nothing to mount it too. When the a**hats stole my plate, they ripped it off the mounts and broke the mounts.
New mounting
The lost riding time, $35 cost, 407 headache, half-a-day off of work bulls#!t isn't worth it! I'm going to have a get a new mount made for the plate, so it's going to be much more difficult to steal. Not impossible, but enough of a deterrent.
my plate got so damage from my old cruiser that the top holes for screws are broken, so its being held by the bottom screws which most bikes don't have, that = deterrent from stealling my plates