Are door pockets fragile or what?

[H.G.P.]

I went to Hershey and never found early door pockets. Ads I've come across on cars for sale also often have missing door pockets. Are they just fragile, fall off with age, driving, removed for racing or what?

[RSBob]

On many early cars exposed to the elements, the back pockets usually resemble bloated whales stranded on the beach. The front pockets are damaged by people trying to improperly remove them. It's easier, and cheaper, to go without. My .02