Yeah, this line of reasoning is exceedingly silly. Stethoscopes can be used to help crack safes, should the people who make them be in legal jeopardy as a result? Good luck convincing anyone to invest in innovation in that kind of legal environment, my friends.

Demonstrating that there's one legitimate use should probably be sufficient in most cases. If you want to be uptight you can think about adding a requirement that the best fit use case must always be legitimate