I had the exact same problem for a hotwheels site ...and no did nothing to deserve the ban...
It is the NTL proxy that the site dosent like... Not My personal Ip...
I have gotten round it buy specifying a proxy ip from a list on here , just another ntl area...
Itsa PITA but is a workaround for now...
In my case it would be ok in the mornings, but late afternoon evenings the site would not accept me and informed me i had been ip banned...the sitenever got back to me withwhat theproblem was , but i realised it was the ntl proxy, not my ip , so the change has worked since then...around a month or more ago it started...
now im getting dropped every 30 mins on 06 and 36 mins?? but thats another thread
Nick.