So - I generally do not unplug my tools when changing blades, bits, etc. Sometime I do, but it just depends on the tool and what I'm doing to it. How often do you unplug your tools? And - have you ever had an accident due to not unplugging?
Update - this is about 150 responses into the poll, and I'm amazed by how many Always or Almost Always responses there are. And yes, it's okay to answer almost always even if you don't unplug your Random Orbital Sander. Me, I hardly ever unplug my Table Saw, but Almost Always unplug my Routers when changing a bit. And DEFINITELY unplug the planer when changing blades. There are a few stories about bad starts that are really interesting. Thanks.