Depending on your neighborhood it's more of less dangerous. I personally use 64bits as it suit me...I've scanned and there's no other available connection in the area so I'm pretty sure I'm the only one using wireless. Even though I would never leave it completely open...it's asking for trouble. Most people would only use (which will slow you down) but it's opening your computer to many illegal use (i.e storing pirated software and the like)