OMG six different versions of the same library is definitely the result of poor communication. I can't wait for an AI powered browser opening alerts saying "please tell those developer fools that did this website to talk to each other :D"
The imaging thing is all very common.
I've seen galleries/grids of images rendered using the original images uploaded by the operator, which obviously were neither checked for size nor resized automatically.
Those stories sound like they're really easy to repeat though.
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