It is not ethical to stockpile just because everyone else is resorting to that method. This logic applies to many things in life also. For example, just because everyone cheated on a test in class or everyone decided to pull a mean prank, does not mean that any individual is exempted from guilt and negative consequences. In the case of stockpiling, if enough people had started to resist the new practice, it would have served as a pattern for others to follow. It would have taught people to act more rationally and change their behavior as well. Just like it only took a few people to start this behavior, it would’ve only taken a few to also stop this behavior. It was the responsibility of each and every person to be that voice of reason during these trying periods, and people simply cannot hide within the veil of conformity.