The "who has viewed your profile" feature leads to epic lulz. There is this forum on the internet that is full or racists, misogynists, and homophobes (and is tangentially useful for getting legal industry gossip). A major troll posted a link to a fake Linked-In page (under his control) with a comment along the lines of: "how did this person get this job with such a shitty resume" (or something like that). When people clicked on the link, if they had been logged onto their Linked-In, their real identity was revealed to the troll, who proceeded to out everyone on the forum. Hilarity ensued.