But there has to be one, because although most squatters just need somewhere to live and often maintain mouldering, neglected buildings and save them from terminal collapse and vandalism, what about the few really naughty squatters, who make a mess and noise, pretend to be artists and pinch your home while you're on hols or in hospital?
Tourists squeezed into the Casa dei Vettii to look at the naughty frescos, like punters in a Soho peepshow.
The point is, July and August have a habit of distilling the wheat from the chaff; these months demand that you maintain, or improve, you standards, else you'll be banished to the naughty corner or a fate even worse (like an elimination final).
But I don't want it to sound like all this is about making naughty people good.
They looked for all the world like naughty teenagers who had escaped a party to take part in a séance.
Muriel Gray, chair of the board of governors (who has vowed that her first act will be to re-carve the naughty graffiti she engraved into the library woodwork as a student) has stated that the school of art "will die if it becomes a museum".
It seems so completely unlikely that this ridiculously wholesome woman would prove essential to my festive cheer and yet, whether it was Mary Poppins or Maria, my sisters and I spent our childhood Christmases watching her gather up various naughty children, and boss and cajole them into behaving properly.
It would be equally nice if the media didn't portray unmarried men as naughty schoolboys, terrified of those crazed women lurking around every corner waiting to kidnap them and take them to the altar.
From the back, next to the naughty kids pinging bands at each other, we listened to the gospel choir's hair-raising harmonies and a minister preaching about Jesus "a rumblin' in the tomb".
I giggle like a child in the afternoon sun, feeling naughty for being so peaceful.
Children are also great viral video fodder, especially when they've done something naughty.
