[jeremysmyth]

Quite a lot, if they hold power or influence. One word: Antivax.

This is why it's always OK to call BS. Sometimes you're calling BS, and sometimes you're spouting it. Debate works until it doesn't, and then you get out.

[kirykl]

Antivax movement is ignorance of proven science. Expressing the opinion that hackathons are bad is debate.