if someone is impressionable enough to be peer pressured into buying too many keycaps, the fact of the matter is, even if they don't overspend here, they're going to overspend on head fi or somewhere else instead.
with that in mind, I really rather have them contribute to our groupbuys.
the best thing would be that everyone would spend correctly, but we're not able to control others' actions through our computer screens. that means we must teach them to control themselves. quite frankly, there are already tens of thousands of easily found articles on how to manage your money.