Please steal this idea and make a product; I'll be your first paying customer:<p>Data Loss Protection (DLP) for retail consumers.<p>DLP (see <a href="http://whatis.techtarget.com/definition/data-loss-prevention-DLP" rel="nofollow">http://whatis.techtarget.com/definition/data-loss-prevention...</a> for a definition) goes beyond what Little Snitch does and does packet inspection to ensure that credit card numbers (for example) are never sent out from your network / box. Ideally, you can add regular expressions to define other PII that shouldn't be allowed to be sent out (your name, address, etc;).<p>DLP products exist for corporate use, but I don't know of any lightweight + inexpensive one for personal use.<p>WireShark, Fiddler or Charles can incorporate this functionality, if I am not wrong. Not sure how one would MITM SSL with WireShark, though.