I'm personally against tattoos for myself but I don't think it's a salvation issue. A couple of my sons want a tatoo for my deceased son but I hope they don't. There are other ways to remember him.
I'm against addictions except being addicted to Father God, His Son and Messiah Jesus, and the Holy Spirit. As for other things, we need to use in moderation. If control to moderation isn't possible, then avoid altogether. That being said, some substances are illegal and are a no. Some addictions can be destructive to body and soul.
Luke 21:34