I couldn't agree more.  On a day of caching several months ago, in 2 back-to-back caches, I found 50 year-old rifle rounds (LIVE), in the WWII clips from back when.  My thought was if a kid found these and one inadvertently exploded.  This sport would be toast.  I promptly removed both sets (10 rounds total), and posted a stern comment on each of the caches hoping that the individual who placed them would think twice in the future.
 
Brian
Team A.I.