Just say that you work for a major media outlet. But you are not a nice person.

So you send send a website you do not like a message via the site’s Contact facility:

I look forward to the day when you pigs get your throats cut….

But you do not realise that the tech-savvy recipient can dig a bit and work out where that message originated.

Then the fun starts.

Scroll down to see the fascinating technical aspects of this sort of thing laid out in all their glory.