You would only likely get caught if you either do something stupid or someone tells Microsoft or Adobe with evidence, even then, the process to grass on them is a ballache, so if someone does actually take the time to do it, then you must have pissed them off so bad you might deserve it.
Why not use FOSS alternatives, or at least say you do?
If your stealing assets and IP, its just a matter of when you get caught, not if.