I buy stuff on a whim all the time. I go used vinyl shopping and I get the album if I've heard good things. If I don't like it, it goes in my vinyl crate.
My $.02 on the bootlegs; let's use a 14 year old kid who knows hardly anything about Zep. He heard a song on the radio, and his dad talks about them. So he goes to the store and picks out a CD. It's a bootleg. If no one tells him it's a bootleg as far as he knows he's got an official album. All the kid wanted was a Zep album, how is that wrong or illegal. He was trying to get a legit one.
On the other hand, if you know it's a bootleg but you buy it anyway you didn't do anything wrong either because you went into the store looking for a cd and they had it there. You paid money for the album, it's not your fault that someone else broke the law and took a tape recorder into the concert. Might as well take advantage of it, afterall they did take the risk of doing that. I for one wouldn't want it to be for no reason at all.