Visitor Q
Bluelighter
I'm not saying I can't think of any examples, but did you have any specific examples in mind of how a weed addiction could cause problems when you said that? I can only think of very low risk examples that nobody should be concerned about.
Chronic weed use drains all ambition. Kills dreams, literally.
However, I would trade a nasty addiction like PCP for a weed addiction anytime, because weaning yourself off weed is usually not that big a deal. A couple of stressed irritable days, some light to medium insomnia for about a week with some night sweats and it's all over.