What are the reasons for the remarkable effect of such traffic signs?

"You are ugly and you cross" is the only slogan that gives the reason for your behavior.

In Influence, a behavioral experiment was written, in which the experimenter went to a queue and asked to cut in line. In the control group, the experimenter will say to the other party, "Excuse me, can I get ahead of you? I'm in a hurry." In the experimental group, under exactly the same conditions, the experimenter said, "Excuse me, can I be in front of you because I am in a hurry?" As you can probably guess, the success rate of jumping the queue in the experimental group is significantly higher than that in the control group (I'm sorry if I can't remember the original data, but you can find a book to read if you are interested, and it is recommended to read the old translation version instead of the version published by the National People's Congress Press)-and this is only because the people who jumped the queue said an extra "because".

Through this experiment, it can be seen that in persuasion, giving the behavior reason can effectively increase the success rate, but whether this reason is reasonable or not has no significant influence.