My ISP hijacks every so many DNS queries to redirect my browser to ads. It also hijacks EVERY unresolved query, which broke SAMBA scripts that relied on stuff not resolving to redirect to WINS.
I complained to the FTC and got a call by some self-important asshole at my ISP that declared "well everyone does it so it's ok!!" to which I pulled out the old "and if everyone jumps off a roof" chestnut.
He argued with me over an hour to try to get me to retract my complaint. I told him when it becomes possible to not have to use Google for DNS, I'll retract my complaint.
He was a complete twat that was very upset that I wouldn't sit still and be monetized, and I that I had the GALL to complain about it.
So 1.1.1.1 respects my privacy enough for me.
It's also nice to have a government regulator with enough teeth to make someone jump like that. They're no ASA.