When you suppress ideas in this way, they become more attractive to a large number of people. There is a problem with bad ideas spreading quickly on the internet, but censorship hasn't helped with this imo.
That sounds superficially reasonable, but I don't think that it's true.
Turn the sentence around: "when you spread ideas more widely, they become more attractive to a large number of people". Repetition works. It's why trillions gets spent on advertising each year.