Which would be a better example of mob mentality overcoming an individual's most rational decision (from the standpoint of achieving their goal)?
1) Calmly going to the end of the Walmart line knowing a position at the end of the line reduces your chances of purchasing any of the items on sale.
2) Joining the stampede into Walmart as soon as you see someone else cutting in line.
I'm not advocating that cutting in line and starting a stampede is a good action. I just think maybe the stampede is mischaractized a bit.
Peer pressure encouraging conformity has some good aspects, as well, which is probably why it becomes such a powerful force in influencing individual behavior. It maintains some stable behavior in society even when that behavior can be disadvantageous to the person in certain situations.
Kind of like the popular ethics question where a poor man has an ill wife that will die without a rare, expensive medication. Should he steal the medication to save his wife, especially since stealing a rare medication means it won't be available to save a different, wealthier patient with the same disease?
Or the famous
Asch experiment where if everyone else gives the same incorrect response, the subject of the experiment has a much better chance of giving the same incorrect response - even when the questions are so easy that the average person would be sure to give the correct answer if tested alone (the percentage of correct responses dropped from 100% to about 63% with 75% of subjects making at least one incorrect response - people can resist peer pressure, but few are completely immune to it).
As soon as one person breaks conformity, others find it much easier to break conformity as well (
Asch experiment and the
Milgram experiment). As soon as shoppers see latecomers making the more rational decision (at least for that single situation) of cutting into line and getting into the store as rapidly as possible, many shoppers throw conformity aside and start looking out for their own interests - society be damned.