If you don't have another provider option, you stand to lose Internet as a utility for your residence, which many would consider a pretty poor situation.
Has that ever happened in practice? I find it very hard to believe that a company normally so desperate for new business as to spam people with sales calls and lock people into contracts (to make sure they can't leave once the service ends up being sub-par) would suddenly start saying no to people's money and cutting them off based on a technicality.