I just found out the same thing Silver. I haven't gone to FB because I don't go on FB at all. But, I know one time I was researching an article about doctor offices. So not here but on a personal blog, I write about some information and linked back to the original article so readers could summarize my point but also look back to the original writer's opinion.
I think it's different when someone copies the entire article though. Like if someone copied my entire Hub then put a link to my original Hub, I still think that's stealing. Why would it be necessary for someone to copy something in the entirety that another person wrote? However, I'm not sure exactly what happened because I haven't checked on FB.