Questions about Rear Brake Drums

I'll give this a shot but what are "poor braking habits"?

 

There can be many. Did you read the links provided?

Extremely hard stops and keeping the brakes clamped hard afterwards was what I was referring too. This causes pad deposits to bond to the rotors in that location. This will cause a pulsing sensation due to the uneven deposits on the rotor. Bedding the brakes tends to evenly coat the rotors with a layer of pad material. That is what is desired.

 

^^ This. All. Day. Long.

Your rotor and drums are both slabs of iron. Almost impossible to get hot enough to 'warp' by actual braking.

You'd have strong brake fade long before you actually got to that temp from boiling the fluid.

It's not uncommon for well serviced rear brakes to last 100k or more. It's not impossible for them to have a cylinder or other component causing a shoe to hang and wear out prematurely, but even that won't warp a drum.

But you should pull the drums, clean everything, measure everything, make sure the adjuster is free and lube appropriate bits at least annually anyway.