wow this is amazing story, i think that no matter what you do, if you are making a quick stop even for less than a minute. ALWAYS lock your bike properly. if you don't have a u lock, and you are sharing with somebody else. make sure your frame is the first to be locked then the other frame next to it, that makes it way harder to a thief to make a quick move , we all have to understand that a Ulock does not guarantee 100% protection the only job it does is it makes it harder for it to get stolen.
Congrats PJ . if you want to get rid of that Goo, use Goo gone put alot of it , then wash your bike with hot water and dawn dish detergent ,