My understanding of this, even in states that aren't as protective of California, is that:
1. Companies aren't interested in your IP, unless it is very closely related to their core business
2. The burden of proof is on them
3. Courts are sympathetic with the individual over the company for this kind of thing
Because of these points, companies try to paint the picture like they own all things you do, as a deterrent, or so that you give them your ideas for free. In practice, their position is at best tenuous / hard to prove, and at worst simply invalid (e.g. in states like California).
My understanding of this, even in states that aren't as protective of California, is that: 1. Companies aren't interested in your IP, unless it is very closely related to their core business 2. The burden of proof is on them 3. Courts are sympathetic with the individual over the company for this kind of thing
Because of these points, companies try to paint the picture like they own all things you do, as a deterrent, or so that you give them your ideas for free. In practice, their position is at best tenuous / hard to prove, and at worst simply invalid (e.g. in states like California).