Right, there's levels of consequences here. You're very focused on what's illegal. Some of the things I mentioned are illegal and you would probably be sued/go to jail for them. Some probably aren't illegal or may even be explicitly legal (NO WARRANTY, etc.) but there are still consequences to doing it. You'll often only get the chance to get people to try your published code that happens to infect them once, and after that they will not only avoid your software but also get people to do the same. They may even be upset that your software did this, because despite there being no legal agreement in place between you and the person that downloaded your software to prevent this, they do have a social expectation that you're not being negligent, or misrepresenting your code. Nothing stops them from calling you a jerk.