I've never thought about the issue of leaving food/drink where it can be messed with, but in my 20s I am 99.999% sure I almost fell prey to someone who had spiked my drink. I was with friends of friends, and left my beer at this really yucko club in Seattle while I went to the bathroom, and soon after getting back I felt VERY sick and bizarre. I had such a huge reaction I made my friends leave, so if someone did put something in my drink for nefarious purposes, they were not successful.
America has some sick sick people, and I put nothing past them...I think that living in other, more civilized countries, people don't think of it...
But eh, I don't like the feeling of having anything stolen from me, so I don't leave a thing. That balloon just peeved me SO much on this trip! It was FREE, nothing of value was taken, but something was taken all the same. Augh. And the pirate hat? The next evening DS told his story (that *bad* pirates had taken his hat) to the right CMs, and they snagged a Lead who gave him a slip to replace the hat, so we were made "whole", but it still felt lousy for quite a long time.
While at Lost and Found to report the missing light saber, we were behind a family that's actually on the Dis. Someone had stolen their personal sweatshirts...and it was the second time someone had stolen from them at
Disneyland...
We do the park backwards while locking your wheels thing (just with the brake, not a lock lock). It's awkward enough for US to get at it, let alone someone else. When we bring our own stroller nowadays, it's just a Volo...
I saw someone with a BIG BRIGHT sign on their park bag, it was laminated and hanging from the zipper...it said "NOT YOURS" on it. I thought it was hilarious and brilliant.