If this is used to scam old people out of their belongings then you really have to question your actions and imho bear some responsibility. Was it worth it? Do the positive uses outweigh their negatives? They use examples of misuse of technology as if that would free them of any guilt. As if previous errors would allow them to do anything because greater mistakes were made.
You are not, of course, completely responsible for the actions others take but if you create something you have to keep in mind bad actors exist. You can't just close your eyes if your actions lead to a strictly worse world. Old people scammed out of their savings are real people and it is real pain. I can't imagine the desperation and the helplessness following that. It really makes me angry how someone can ignore so much pain and not even engage in an argument whether it's the right thing to do.