You should feed your own ego a bit more and make their devices vote for Trump on next election because you seem to know better what they need. DDG is cool and usable but to go that far and change my family's or friends default SE with something else which is inferior, unexpected and uncalled for is just..rude to say the least. A tool is a tool and people should use the best there is otherwise you're just putting them on a competitive disadvantage in life since we use a SE for almost anything these days.