Wildcrafting requires skill and practice. It requires a positive identification. If you are not sure of the plant, or if you are not sure how to harvest wild plants ethically, DON'T wildcraft. Seek one of the many fine teachers available to obtain the necessary skills first. There are many reasons why people smoke Tobacco, Marijuana, and other herbal mixtures.
Some herbs taste good when smoked.
Certainly, an oral fixation, or some subconscious early childhood memories of mom's nipples, contribute to constant smoking. Recreational use of Tobacco can lead to the dreaded addiction so prevalent in the world today. Tobacco has firmly ingrained itself in every culture in the world it has been introduced to, except for a few religious sects. It is very hard for most people to stop on their own. Marijuana is not physically addicting, but there are a few folks who smoke every day and form an emotional dependence on it.