From time to time, I tussle with various animal rights activists online. Over the summer, unfortunately the radical animal rights types, those who think that, at the very least, vandalism is perfectly acceptable in the name of their cause, some of whom think that action up to and including murder of scientists could potentially be morally justified, came to my campus. They also threatened and harassed an excellent scientist whom I know personally and with whom I've served on a committee. That's a bit too close.
Then there are animal rights apologists whom, although they make a point of…