While it's true that it might cost less or at least not more to allow for recycling the ms., I guess I'm still a little paranoid about having other people dispose of a full manuscript.
I'll have to see if it's safe and reasonable to have agents and editors dispose of the ms.
Ok, let's have a tiny little break for reality here.
First, when you hear about people prowling through the trash for "things of value" I assure you that your manuscript isn't even in their Top 100 list. They are looking first and foremost for SSNs, bank account info and proprietary info.
And just exactly how do you plan to find out if it's safe for agents and editors to discard your ms? A little quiz included with your query? A surveillance team sent to watch?
Do you honest to god think anyone is going to steal your DISCARDED manuscript from the trash? Honey, if they want to steal something, they want to steal something we LIKED, not something we rejected.
People who paw through the garbage for souvenirs want them from famous people. And even then, those people are collectors (disturbed collectors but collectors) not writers looking to pass off your august tome as their own.
Get over yourself.