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One aspect that I don't believe has been discussed are the cultural implications of recreational pot use.

There is a distinct pot smoking "culture" which is widely seen as antithetical to Traditional Catholicism.  Cheech and Chong etc.

Didn't Paul discuss this with regards to eating food that is sacrificed to idols? (1 Cor 8) Even if a Christian understood that it wasn't sinful to eat such food, if doing so could cause scandal to others he advised to avoid it altogether.

I think this is the crux of the divide at CathInfo on this issue.  Some can rightly make rigorous distinctions for certain criteria which would morally allow the use of mj.

While others are rightly concerned about the unseemly culture that tends to go with the practice and the scandal that causes especially to young people who could be misled. 

This is especially distressing and upsetting to some because we are losing our Catholic culture in every way and are trying very hard to retain a semblance of the Catholic culture cherished by generations past and pass that down to our children.

Not everything that is licit as advisable.

7But there is not knowledge in every one. For some until this present, with conscience of the idol, eat as a thing sacrificed to an idol: and their conscience, being weak, is defiled. 8But meat doth not commend us to God. For neither, if we eat, shall we have the more: nor, if we eat not, shall we have the less. 9But take heed lest perhaps this your liberty become a stumblingblock to the weak. 10For if a man see him that hath knowledge sit at meat in the idol's temple, shall not his conscience, being weak, be emboldened to eat those things which are sacrificed to idols? 11And through thy knowledge shall the weak brother perish, for whom Christ hath died? 12Now when you sin thus against the brethren and wound their weak conscience, you sin against Christ. 13Wherefore, if meat scandalize my brother, I will never eat flesh, lest I should scandalize my brother.

And most people go to bars to get drunk and have one-night stands.  The "alcohol culture" is the most immorally "socially acceptable" anti-catholic culture that exists.  Doesn't mean it's a sin to go to a bar...