It’s a fake story. It is not the Washington Post.
The thread should be pulled because it falsely attributes the source to the Washington Post, WaPo.
And btw, 67% more likely doesn’t mean 67% of motorcyclists.
Still, that number is made up. A hoax.
The article appears to be a repost from here http://nationalreport.net/fbi-admits-registered-motorcycle-owners-classified-gang-list/
"58% of all statistics you read on the internet are made up." - Abe Lincoln