It doesn't matter it's about flat-earth, it starts a bad precedent.
Bullshit. The subject matters and the user's blatant lying matters too. Your attempt to make this into some free speech issue is pathetic. This is a Bitcoin forum, not a "come here to lie without consequences" forum. I'm sure there are places for flat-earthers to discuss their pancakes without repercussions. On this forum however trust matters and it just so happens that a liar got called out as untrustworthy.
Here are some other things you want to avoid "discussing" here:
"$10,000 reward for a Super Hero Legendary Merit Source account and how it relates to Bitcoin"
"$10,000 reward for a plagiarism bot and how it relates to Bitcoin"
"$10,000 reward for running a ponzi ICO and how it relates to Bitcoin"
"$10,000 reward for killing Vod and hiding the body and how it relates to Bitcoin"
I'm sure there is an endless list of idiotic shit that one can frame as a "reward" and then claim to have an "opinion" justifying it. Doesn't mean everybody has to consider such behavior trustworthy.