I heard somewhere that if you gave someone an object with full permissions it's your own fault blah blah. Thats kinda bullshit though as you can easily accidently give people objects. I've done it -- nothing important luckily but I've done it. Could just go to rez something and someone runs infront of your mouse cursor -- bam!
So, I suggest a dialog box when giving an object to appear. "Are you sure you what to give (Insert name) a (insert item name) with these permissions: (show permissions)
YES/NO"
Sounds simple enough. No more mistakes. And if people blindly click OK -- well then yeah, it's there fault.