Gokul43201 said:
Bob, the adverse effects on health of alcohol, tobacco and drugs are well-established. Do we have conclusive studies that describe the adverse effects of exposure to porn? If such studies exist, they would provide a reasonable basis for criminalizing exposure of minors to porn.
I would say there are no conclusive studies one way or the other from reputable sources about whether kids exposed to porn is healthy or unhealthy. It would also be a very hard study to conduct.
It's easier to study the link between viewing violent media and behavior (the government tried to extrapolate results from violence studies in the US vs Playboy case due to the lack of research into the effect of pornography on minors). In the few impartial studies that show at least some correlation between watching violence and being violent (at least some link to behavior), there's still the 'unanswered' question of whether violent kids like to watch more violent movies or whether violent movies creates violent kids.
You run into the same problem with pornography and minors. Do minors that are very interested in sex both watch it and engage it more often than others? (Well, duh!) Or does watching more sex cause minors to be more likely to engage in sex? (Possibly, but you couldn't get direct evidence for that. You'd have to pull in research on violence, tobacco, etc and assume the same would hold true for sex).
There's virtually nothing other than anecdotal stories about the long term effects of pornography on minors.
Absent any scientific evidence one way or the other, one side can say it's a dumb risk to take with equal validity as the other side saying how could it hurt anything. The argument comes down more to a moral issue and parents' rights issue than a scientific issue.
It stands on about as firm a ground as those opposed to having their kids exposed to school prayer, but both can evoke some very strong opinions both ways.
I'd lean towards the 'why risk it' side, but then, I've always been more influenced by risk avoidance than probability when it comes to my kids.
As an aside: Alcohol abuse has a long term health and social impact, but you can find a few that would argue that exposure to alcohol at a young age has some positive effects, as well: http://scotlandonsunday.scotsman.com/index.cfm?id=1104642006 . Alcohol abuse is less prevalent in France than Scotland, so he's not completely loony (not that I find him very convincing, either).