Namely, I meant that such events are often lacking in one or more of the following; first aid stations, lost and found and security.
Now before people think, "Hey, you said members are responsible for their own safety and items, so these are simply contradictory.", I will want to share something that happened to me today.
Firstly, my friend lost her phone. She was panicking, and the founder apparantly took out the sim card and claim it for his or her own use. Later that day, I picked up a lost phone, and have no idea how to return to the owner, due to obvious reasons. Turns out, I turned it in to one of her relatives who happened to be in the area.
Now, people might feel, "Dude, they are being careless, how is it our problem?" I then will want to ask, what if it was you who lost it? What if, it was something you needed, like medication, or money you were supposed to give to a team member for supplies?
Most importantly, what if someone picked it up, but have no idea what to do?
Thus, I believe, every event, should allow a method for lost items to be turned in, and people who lost their items can check. This is a simple, yet helpful service, and although most might have a service as such, it will be helpful if attendees know where to go to.