The chairs are cheap, but they do not break easily. Because they are cheap, and are left exposed to the elements, eventually the plastic hardens and cracks at stress points, which must be well accelerated when fats plop their asses on them. I've never seen one break under a normal person (and fat people usually avoid them), just do a quick visual inspection to make sure there are no cracks before sitting and pay attention when you're removing support from your legs and muscles to see that it's supporting you. Fats can't sit down properly, they just fall into the seat, so if the chair breaks, it's always catastrophic, they can't stop the fall.