There is no open source license nor nations laws which I'm aware of where one may lose your own ip by illicitly comingling it with another's. You may in some c

There is no open source license nor nations laws which I'm aware of where one may lose your own ip by illicitly comingling it with another's. You may in some cases choose to do so if it is both possible to share your code under the same license and desirable to do so but you can never be forced to do so. Viral licensing is a fiction. You have always been able to simply rip out the offending code. The reason not to borrow until you are caught is that you could likely have found permissively licensed code to do the job in the first place and ripping the old code out after the fact is more work than doing it right the first time. Furthermore in some jurisdictions you could face court costs or damages. More so yet if your infringement was willful.