Page three also has a handy thing fer keepin hands OFF yer 'ped.
I use Model # Charge1K myself, but it's a bit, umm..extreme for campus use.
Alarms are prettymuch ignored in this day and age of car alarms, tracking devices are much handier, most moped thieves don't go far....and as for preventing vandalism one of those zappers does a nice job of keeping hands off.
(Pity the doggie that lifted a leg on my ped a couple nights ago, but then, that's why they have leash laws..)
You shouldn't use common chain, it's just too easy to bust, I reccommend heavy aircraft or elevator cable (home depot has it !) and a pin-across lock, which looks like this.
But on-campus the most effective defense of yer wheels is an "example" or two of what happens to folks who mess with your moped...a little of that will go a long way.