My old area, Baltimore City ?
The answer would be HELL YES !
I've had one stolen and chopped by a repair shop, while it was in that very shop for repairs, and one of the shops that i used to buy them from, i suspect of stealing another.
(It seemed odd to me that more than half the mopeds they sold were stolen, alarms and security notwithstanding, about 3 months later - my suspicion is that they were just re-crating them till they weren't "hot" anymore.)
Yet a third i found in the police impound after reporting it stolen, yet when i came back the next day with proof of ownership - it was no longer there...some cop must have taken it for his kid, bastard.
Had one lifted from a bicycle rack by someone who put the whole rack, bike, chain and all, into the back of a truck while i was at work, and those same cops also refused to let me take that one back from the yard of the jerk who'd stolen it, threatening me with a trespassing bust - for trying to retrieve my own damn bike !
(i knew who did it, and he had it in his yard in plain view, mind.)
And then there's the amateurs.
Ran into the rope-across-the-road gig not once, but twice....at least one barricade with a smash-n-grab intent (more smash than grab, it was a street gang i had run off the street from my 'ped with a length of chain a week earlier, and they were very pissed.)
Numerous shove-n-run bikejacking attempts, sometimes with thrown objects such as rocks and bottles (good reason to wear an Mk-65 Army Field Jacket with Motorcross armor under it, as well as boots/helmet)
And all of that, repeatedly, while i was ON it !
Even sitting still it was a target, we lived on a small hill, and the bike was run up that hill about 2 feet from the front window, and chained to an 8-ft long, very thick, barbed metal stake we had driven into the ground and poured concrete around, and that chain was nicknamed "drawbridge chain" cause it would raise one, more or less.
The chain was also locked with a "Circle Lock", making it impossible to just cut the hasp, too.
This was no deterrent at all, either, on average there were two attempts to steal it per week, and most of them resulted in vandalism damage, smashed headlights, turn signals, etc....not to mention the old sand/sugar in the gas for laughs.
Many of these were broad daylight attempts, often right in front of us, especially after running one of them from the yard with a crosbow, and nearly being arrested for defending my property by the police, while the jerk who tried to lift it was standing right outside my yard snickering...the cops were a bit less than no help, in protecting your wheels.
The last bike i owned in that city was a Tomos Trike, and it met it's end when some thieving bastard who could not take it from me tied it to a truck and tore it apart trying to break the chain...then set it on fire for spite, while i was in the hospital.
If you own a Moped and live in Baltimore MD - MOVE....I did, and good riddance to the place.
Since then, no problems.
My Reccommendation ? Chain a the bike down six ways to sunday, get a very large and hostile dog, and tie him to it too, and buy a shotgun.
Anyone touchin my bike, i don't even yell a warning, hell with em, my patience with it is gone...they get both barrells of an over/under 12g loading rocksalt, ankles-to-eyebrows and i'll see em in hell.