Comcast in the US has injected content into non-secured pages to notify customers of things. That is a horrible business practice that should not be allowed.

What can I, an individual with nearly zero political clout (I can vote... but I live in a gerrymandered district... another layer to the problem!) do to get this problem fixed? Best case scenario, I say something, it goes viral, people march in protest against bad ISPs, the monopolies get broken up, etc. But how long does that all take?

Meanwhile, I'll only use HTTPS websites as a first-line of defense. The "much bigger problem" can be solved in parallel.