A girl on my Facebook posted the complete wedding invitation of her best friend on facebook with the caption #shitjustgotreal. Full names, date, time, place, everything. If I can see it, I know her entire feed can see it.
DONT SHARE OTHER PEOPLE'S INFORMATION, especially on social media where hundreds of people can see. It's so rude and a safety concern. Not everything needs a post.
UPDATE: someone commented on the picture, "does this mean that everyone who sees this is invited?" It was perfect. She took the picture down about 30 minutes later.