you have to drink a HELLUVA lot of drink to seriously damage yourself.
Well, that's the thing; from what I have heard, alcohol has these addictive properties that make the person always crave for more, and the smallest dosage is enough to start the sequence. They say it calms your mind if drunk in moderation, but that is exactly what I want to avoid at any cost; brain must work at full power at all times for me.

At any rate, alcohol is expensive and staying away from it saves money.

As for the legal aspect of it, as long as it does not affect the productivity of the people otherwise, I don't really care. When it does begin to affect that significantly, it should be purged immediately. This is the reason that many other types of narcotics are outlawed in most nations. However, this age thing for laws of any kind is just beyond ridiculous, both useless and discriminatory; either make the minimum age 0 or ban it altogether.

On the porn laws, it seems perfectly fine to me, or rather, no worse than making the legal age five times that; sex is dumb as hell anyway, but the ages will make no difference. (they can make porn movies of newborn babies for all I care; the problem comes up when it affects the economic productivity of the people)