Do you remember the trouble you could get in for plagiarizing your schoolwork? If you got caught, you’d be lucky if you only failed the assignment. Why? It isn’t right to copy someone else’s work and claiming it as your own. It’s cheating.
The same holds true on the internet. You can’t cut and paste someone else’s work and publish it as your own. What may hold true for Facebook (doesn’t everyone re-post pictures of cats?) doesn’t work so well when you are trying to post some information.