Journal article by Albert C. Gunther; Journal of Communication, Vol. 45, 1995

Research bas produced plentiful evidence of the third-person
perception--the tendency for people to think others are more
influenced by mass media than they are themselves. But until now
there has been scant evidence of the effects of that perceptual bias.
Consistent with past third-person effect findings, the data in this
study indicate that a substantial majority of U.S. adults see others
as more adversely influenced by pornography than themselves. In
addition, the results show that peoples' support for pornography
restrictions parallels the discrepancy they perceive between effect
on self and effect on others.

The effect of intuitively knowing something is wrong is attested to in this research