I thought opting in or out of BT Fon was very simple. There is even someone posted on here that he opts in when about to travel, and out when home-based.
As I understand it, on ADSLx
it takes 500kbps maximum off your download speed when being used. Whether it takes more on an Infinity connection I don't know, but there's an awful lot more to play with.
Bear in mind that the people likely to utilise yours would be few and far between, unless you live on a High Street or similar.
I'm sure it is all covered somewhere on their site, as a couple of years ago I read all about it.
It also seems a bit rich that you should want to benefit from Openzone/FON connections but deny others the use of yours
As Infinity is by far the best value FTTC product so far, you may be cutting off your nose to spite your face. I don't think FON is such a big deal at the providing end.
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