And more to the point, let's say they did add a substance such as nicotine to the marijuana they sell. They would have to disclose that information.

You, as the consumer, have the choice whether or not to purchase the product. You either support them or you don't. This is one of the many benefits to free exchange of goods. The market will quickly show that there is a larger demand for additive free marijuana.

And ofcourse, no one company can hold a monopoly on an industry. It would quickly be broken apart just as MANY monopolys have been in this country.

Obviously this is a snipet of what could turn into a huge debate. Any economics major will tell you that you have nothing to worry about when legalization comes. In fact, you'll have a lot to gain in the form of more avaliability, higher quality, and lower prices.

As far as growing your own when it is illegal...I don't see this being a big trend either. Case and point: the distilling of grain into alchohol is a process much simpler than growing, harvesting, and producing marijauana. Yet, virtually no one distills their own alchohol. Why? Because it isn't cost effective.

Anyways...that's about enough for now.