I think at the end of the day, you pretty much have to work on the basis that any cab leant to any event could come back damaged and / or non working. I think to consider it any other way is doing yourself an injustice and could only lead to heartache.
Now, obviously that's a major generalisation, and should be taken as no more than that. Obviously different organisers of different shows can implement different policies as they see fit.
For instance when my Star Wars pin went to our Star Wars conventions year in year out, it was manned pretty much at all times. Or it wouldn't have been there. Not hawkeyed like a bouncer, just someone around to keep half an eye on it. Because of that, it only ever suffered the general wear and tear of getting there and back each year.
Now, obviously that's a major generalisation, and should be taken as no more than that. Obviously different organisers of different shows can implement different policies as they see fit.
For instance when my Star Wars pin went to our Star Wars conventions year in year out, it was manned pretty much at all times. Or it wouldn't have been there. Not hawkeyed like a bouncer, just someone around to keep half an eye on it. Because of that, it only ever suffered the general wear and tear of getting there and back each year.