Some of us have done it at some point. Such as myself who literally did it 10 minutes ago. Getting ready to High Alch your tab from Slayer or what not, only to accidently leave your main equipment (Whip, Zamorakian Hasta, DFS, etc.) In your inventory and accidentally alch it.
Is there a way to code a warning message when alching anything over a certain value? Such as anything over 100k? Or 75K even? Not many items are worth over that much from an Alching stand point. It would make for a less frustrating situation that can simply be saved by a single message.