We used to have a wireless system but got rid of it about a year ago because connection speeds were not great in parts of the house and also we figured that people were tapping into our allowance from outside the house.
One night we had 12 GB gone from our allowance!

I don't even know how that is possible, but I rang TC and they confirmed it. We did have a lot of teenagers around at the time and I checked all computers for torrents but they seemed clean to me. A lot of the allowance was sucked out in the middle of the night when no-one was up.

So we got sick of having wireless and paid a great chunk of money for someone to come and hard wire it all. So far so good, up until now...