@mamabunny My mom was wondering what you do to keep it safe when you're at Disney apart from just taking the key with you. It's so lightweight, do you carry around a bike chain, or is there another way to make sure it's secure?
Hi Jen! Hi Jen's Mom!
Actually, there is *no key*!

I know that's kind of scary, but what I do is disconnect the battery, and then tuck the end of the battery cable down under the corner of the red fabric triangle that serves as storage (and BTW, that little triangle can haul a TON of stuff around in it!). So I don't have to worry about carrying or losing a key - I just plug/unplug and go on. I do set the brakes when parking - you do that by squeezing the handles in tight, and then setting the little stopper. You can still move with the brakes set, but it's not nearly as easy, and it's certainly enough that you don't have to worry about him rolling away on a slope.
I have never really had any problems with anyone messing with Angus in all of the times I have taken him to WDW, or anywhere else for that matter. I think that because there is a handicap symbol prominently on the top of the battery, people seem to realize that it is really a mobility device, and they treat it with respect. Although I am no longer able to "park and walk", I do have to (for example) leave him parked while we have lunch at Garden Grill at Epcot, and have never had a problem leaving him anywhere at WDW. Just like with any other scooter, stroller or other unattended mobility device, from time to time a CM might move him, but overall, I never give it a second thought.
We can't use bike chains/cables or anything like that at WDW; someone with a bolt cutter and a CM uniform will come along and helpfully remove that for you!

The reason is that CMs have to be able to keep walkways as clear as possible, and they also have to be able to move everything in the event of an emergency in the area. So never try to lock up anything, or you will be out the money for the chain or cable.
You have to remember that everyone at WDW has paid a fairly significant price to get in the gate. And although from time to time we will hear stories of people having things stolen (from strollers, or
ECV baskets, etc.) the vast majority of the time there is no problem. I feel safer in the Parks at WDW than I do almost anywhere else in the world; everyone there has been security screened, and there must be a huge number of cameras that Disney has trained on Guests all over the Parks.
I can't guarantee - obviously no one can - that there would be no problem leaving your TravelScoot at WDW, but I do on a regular basis (an average of two times per year and an average of 10 days per trip...) and I really believe that you won't have any problems either.
Also - the "CrampBuster" I referenced above is a device you can easily slip over the twist throttle on the TravelScoot. It gives you a "paddle" that you can either push down on with your thumb, or the heel of your hand, or you can even use the pinky-finger side of your fist if you need to. I had to get a CrampBuster after I dislocated my finger, and now I won't ride Angus without it.
I don't know what part of the country you all live in, but if you are anywhere near Tulsa, Oklahoma, I will be glad for your Mom to meet Angus, and try him out before she buys one.