Destroying PC loot outright with no hope of avoidance because it fits what you want, especially spellbooks and other life's blood / long term achievements is a Very Very Bad Idea. The occasional loss is fine.. the occasional set back is fine, but "Things will be Different Around Here" is a statement you don't want to make by putting frowns on everyone else at the table.
If they have too many items for their level, determine what level they should be to have what they do, and figure on lessening their treasure input until they meet that figure. Level 6 party with level 8 wealth? Fine, minimal treasure till 8th level. Problem Solved. If there's too much of a gap, or a ridonkulous item in game that just should not be, then i take exception.. but not everything.
And to not make it seem like you're being too cruel, one time use items like potions and lil glass beads that shatter when you cast magic missiles out of them make great doohicks for players.
... and just so i'm not saying Adventuring life is full of candy and huggles.. introduce appropriate CR challenges that would do what you want and still may be stopped by the PCs. An APL 7 party vs a Fighter 7 with a Sunder feat or a lot of rust monsters is fine. It's the Level "Big" baddies that charge in, bonk the players on the head, drag em off, strip em, lock em up, burn their stuff, and then provide some silly foible that allow the PCs to escape with their lives that's not cool.
If they have too many items for their level, determine what level they should be to have what they do, and figure on lessening their treasure input until they meet that figure. Level 6 party with level 8 wealth? Fine, minimal treasure till 8th level. Problem Solved. If there's too much of a gap, or a ridonkulous item in game that just should not be, then i take exception.. but not everything.
And to not make it seem like you're being too cruel, one time use items like potions and lil glass beads that shatter when you cast magic missiles out of them make great doohicks for players.
... and just so i'm not saying Adventuring life is full of candy and huggles.. introduce appropriate CR challenges that would do what you want and still may be stopped by the PCs. An APL 7 party vs a Fighter 7 with a Sunder feat or a lot of rust monsters is fine. It's the Level "Big" baddies that charge in, bonk the players on the head, drag em off, strip em, lock em up, burn their stuff, and then provide some silly foible that allow the PCs to escape with their lives that's not cool.