Holy moly new fear unlocked, is this a real issue beach goers face? Have never heard of it.
There are also different species of stingray, and some sting more than others. The ones that bury themselves in the sand when threatened are more likely to get stepped on (and then sting). Other species tend to run away when frightened instead.
Eg https://www.patagonia.com/product/r5-yulex-round-toe-winter-...