Ask people if they like being more-or-less forced to use some companies over others, or if they like paying a premium for online gaming. Ask people how they'd feel if Optimum decided to slow down traffic to Fox News if Fox News released a story unfavorable to Optimum. Ask people how they'd feel if a startup that intended to compete with Netflix was effectively shut out of the market by deals like theirs with TMobile.
Better yet, show them an image of internet packages ala cable. That'll make them change their tune.