I can't say that it's most dangerous website, but there are abusers 
Manhunt intensifies for survivalist who threatened to put a bullet in Trumps head
Keep it up Morganelli, I promise Ill put a bullet in your head as soon as I put one in the head of President Donald J. Trump, the fugitive wrote on Facebook back in June, as cited by The New York Times, making criminal threats against the district attorney of Northampton County and the US president and triggering a major manhunt in the process. The so-called Bush Crafter also threatened to use full lethal force on any law enforcement officer that tries to detain me.
https://www.rt.com/usa