Home wifi and restricting others' usage
I will shortly be taking in a couple of colleagues as lodgers in my home and as part of the deal they will have access to the internet through the house wifi network.
I am concerned that as the bill payer, I could potentially have problems if my housemates use the internet connection for anything dodgy or illegal. I am particularly thinking of illegal filesharing, copyright theft, downloading movies and music but also if they happen to be into dwarf porn or, God forbid, something worse.
Is there any simple way of blocking undesirable internet usage on a home wifi network?