I've never had a problem with that, and it's pretty straight forward IMO. Work computers stay at work. My computers stay at home (or at least not at work). I

I've never had a problem with that, and it's pretty straight forward IMO. Work computers stay at work. My computers stay at home (or at least not at work). If I create something outside of work, not using proprietary data/algorithms/whatever from work, and using my own computers, then it's mine. I'd never work somewhere that tried to claim ownership of work I did outside of work. Needless to say, common sense applies, and it's probably not a good idea to have a side project that competes with your employer (even indirectly), helps their competition, or makes them look bad somehow.