You can't just label everything as "doing business" and then regulate it all. If I make something interesting and give everyone in the world the blueprints so they can make one themselves that's not "doing business".
Much as I ardently support FOSS (and similar: open hardware, say) I also think this idea has some use and deserves substantial consideration.
It is difficult to draw the line here, much more difficult than it seems at first, in my personal opinion.
Now, you say "but I'm not doing that", however the law needs to account for those who would use the freedom to create something and give it away in order to manipulate the market. It happens.
So in my opinion, whilst I absolutely want to ensure FOSS projects can operate, I also want to ensure large companies can't simply release a product as OSS destroy the market and once captured then only update their commercial offerings, for example. So, it needs a bit of thought.