And most of us are so eager to get something free that we may be distracted from thinking clearly about the offer or the promise being made. We know the familiar warning, "buyer beware," but it's time to heed another warning: Beware of come-on email attachments and free software. The savvy attacker will use nearly any means to break into the corporate network, including appealing to our natural desire to get a free gift. Here are a few examples.