PlusNet have always done this in style though by hiding the the fact its 5 years on a "Sub Page" of the terms and conditions. This has now changed I think ( or has on the move my broadband page ) but I know when I last signed someone up you had to read the terms and conditions then there was a link under the deferred bit crudly explaining it with a table. When most ISPs are doing "Free Activation" and "Free Modem" and everyone else is tying you in for a year and PlusNet dont explain it clearly its only right that we have this confusion.
Because of this we have now have people who
A) Dont know they are on deferred Activation
B) Think its only a year.
True the customer holds some blame for not reading the Terms and Conditions in full inc all the sub pages on sup, fup, sharing etc but when the ISP entraps them in by making the information as small and hidden as they can in the small print its hardly surprising. Plusnet taking dishonest approaches in advertising actually gave them more backlash than customers as all it does is irritate the consumer when they come to leave.
Another "Mistake" to add to the long list its a shame they never learned.
Pluscali No Need to Monitor your usage *
*Applies only to the first 2GB