I doubt that ITV would have an issue with you watching their programming. It is actually your local network that paid for the exclusive rights to broadcast it in your area that is losing out.
Is ITV posting anything on their YouTube page? Is anyone else posting it on YouTube? That's normally the first place I look for live sporting events.
This. That's why it's blocked in your area. To make your local distributor happy.
If your local distributor sucks, and you wouldn't have been interested in their product anyway, the only thing you are costing anyone is bandwidth on ITV's side. And bandwidth is cheap, at least one stream's worth.
Almost like how for a while it was literally impossible to pay for Game of Thrones in Australia... and still impossible if you're an American on a trip in Australia. My GF was in Australia last year while GoT was airing, and she wanted to watch it. We had a paid HBO Now account here in the US (at the time), but that won't work from an Australian IP. She tried to sign up for Foxtel Now (I think), the Australian channel that carries it and has a streaming service, but she couldn't pay for it with an American credit card. So she pirated it. Who loses there?