There is this iPhone app for Virgin media that contains a remote that allows you to control your TiVo box.
My brother is currently in the living room watching tv, I am in the dinning room with my iPhone remote. Every time he turns the tv on I turn it off. I can just hear him shouting and getting angrier and angrier because he had no idea what the fuck is going on.
This is the best thing i’ve ever done. 10/10 would recommend.