One should respect public opinion insofar as is necessary to avoid starvation and keep out of prison, but anything that goes beyond this is voluntary submission to an unnecessary tyranny.
The sheer scale of human society presents the necessity to governance and law. Law is a structure which presents the opportunity of power, the power to hold dominion over your fellow humans.
Where there is power there is corruption and abuse. This rule is absolute.
Therefore: If we are to have laws and government then it will suck to some degree. (P3nT's first principle)
A popular tendency toward blind obedience will, more often than not, increase the degree of suction.
Therefore: Questioning the validity of the law and deciding thereon whether or not one will obey, affords the opportunity to lessen the degree of suction when applied to self. (P3nT's second principle)
In theory one should only bound by law if one is captured in the act of breaking said edict. The ingenuity of both government and criminality will ensure that this is not always the case.
Therefore: Innocence and guilt are not absolutes in the practical application of the law. (P3nT's third principle)
The risk of being captured and punished under the law, regardless of ones innocence or guilt is never zero and rarely, if ever, will reach absolute.
Therefore: Weigh up the risks, do whatever the fuck thou feelest like doing and, above all - don't get caught.