In our zeal to head off others' unwise action, we may put forth ideas they have not entertained. It may not be wise to caution against such possibilities. Prophylactic admonition may trigger novel mischief. As the popular saying goes, "don't give 'em any ideas." In other words, don't give examples of how to cause disruption (e.g. "don't click on this link or you will crash Uncyclopedia") because this may will actually tempt some people to do it.