Breaking a law that does not disagree with the Word of God is sin. See the following scriptures regarding submitting to human authority: Romans 13:1-7, Hebrews 13:17, Titus 3:1, Romans 3:1, Ephesians 5:21, Daniel 3:1-30 (example of when a law does not agree with the Word of God). Also, illegal drug use would fall under the same category. Also, 1 Peter 5:8 calls us to be sober and alert do that we can remain strong against the enemy. When we compromise our mind we become an easy target for the enemy. I feel the same is the case for being high. Also, 1 Corinthians 3:16-17, is the verse about our boy beig the temple of the Lord. We surrender our bodies to Christ when we give Him out lives, and with this we surrender our fleshly desires. We choose to leave those things alone because it compromises our minds as well as our ability to witness. If the world is so accepting of it, is that not also an indicator? We are called to be holy and sanctified, set apart an different from the world. See: John 15:19, 1 John 2:15, and James 4:4. Hope this helps! I apologize if I come off preachy in any of this, I am simply very convicted to abstain from all alcohol and drugs. However, I don't judge for it, people close to me struggle with it, which spurred my conviction.