Come on guys, have a bit of tolerance. Whether you like it or not, being a newbie is a ligitimate excuse and considering the number of new members that come through on a daily basis, the proportion that do the "wrong" thing is actually quite small. The only why newbies are going to learn is if they are told so the best thing you can do is just politely direct them towards a pinned thread stating the required rules and regulations and request a guide move the topic to a more appropriate area. People appreciate a little tolerance and a gentle reminder more than rudeness and posts like "This is in the wrong place!" which doesn't really explain what they have done and where exactly their thread should be! If you feel you are unable to do this in a reasonable manner, you can always ask a Guide to move/close the topic and have a gentle word with the person.
Remember, we were all newbies once and everyone has to start somewhere! You have to learn to sit up before you can crawl before you can walk!