Unfortunately, in the US and Europe at least most people will care about this and even get a response. I think 4-5 years back when I was in one of the cities in which MTNL is there in India, ads were being served in the same way on MTNL. They were injecting an ad serving pop-up on every page served on HTTP. The worst thing was it sometimes used to show some sketchy virus ads also. I complained about it multiple times, never even heard back from them.