No, not for Christmas lights and gifts but for spammers and hackers to steal your and your member's info and try to hack their email with spam of even their bank accounts!
So please, keep your SMF and your mods up to date as well as your Windows, Adobe products, etc. I suggest re-reading the tutorials in the SMF 2.x Security block on the left. If you need help just ask.
Here's a list of them all in one place:
http://www.docskillz.com/docs/index.php?cat=32 (http://www.docskillz.com/docs/index.php?cat=32)