This type of internet-scamming is going to be increasingly common, and programmers really need an ethical duty not to participate. It's not clear to me that it

This type of internet-scamming is going to be increasingly common, and programmers really need an ethical duty not to participate. It's not clear to me that it's unethical to build a tool that someone could use to harm themselves. Further, you've just described how this will go on anyway ("censorship as damage" and all that).