Apparently ‘We can hear you having sex’ appears with a degree of regularity across Britain and Ireland:
“My favourite a few years ago was ‘StopHavingSoMuchSex’,” notes K_Alva on Reddit of one network. “Ironically, it was unprotected.”
My own favourite is probably “Covet not thy neighbour’s wi-fi”. The BBC article notes however that not all interactions are confrontational:
One generously offers “Free Wifi For Neighbours”.
“Hola Neighbourinos” and “I like my neighbours” further show that networks names need not be a form of conflict.
(Thanks to Emily Cockayne for the heads-up).