What is a troll and how do I know if I am reading a troll question?

Internet trolls are people who create problems for others on different sites while contributing nothing positive. There are many on Yahoo Answers, they report extremely small violations, which in many cases aren't even violations; they also give "thumbs down" constantly often with no valid reason. Because of trolls, to protect yourself, if you haven't done so already, you may find it best to edit your info to keep your questions and answers hidden that makes it tougher them to stalk you around the site. You can also change your avatar and i.d.or post in other than your usual categories. Trolls often hang out at controversial sections such as religion, homosexuality and polls, when someone posts what they disagree with, they report them.

http://en.wikipedia.org/wiki/Troll_(Internet)

According to yahoo: A "troll" is someone who intentionally and persistently posts inflammatory messages about sensitive topics to bait users into responding or provoke a confrontation. We also consider people to be trolls when they persistently misuse product features such as the ratings system to negatively target others.

You'll often recognize troll questions by their stupidity or kindergarten humour. A general rule of thumb, "don't feed the trolls," don't answer, just ignore and move on.

A troll is basicly someone that has taken the time to think of an idea to fool people, they make you click on links that lead you to misleading pages such as the "see More" link on facebook, and "continue reading" wich all lead to troll facebook pages, To make sure you don't get trolled hover your mouse over the "see more" or "continue reading" button and if a page appears then it's a troll link, this is very vague but i hope you get the idea