I'm thinking about posting a question/challenge to come up with a "sneaky" plugin, one that looks innocent, but can do stuff behind your back. I was inspired by the many filters in the plugins page: ...
We've had several questions that border on ethical issues. But we've only really addressed the issue of questions that are ethically ambiguous ... not answers that offer potentially unethical advice. ...
There are two (so far) distinct topics that came up several times already and make me wary: scraping and syndicating of sites; PHP backdoors and kill switches. Both can have perfectly legit uses ...