Only by your misconceptions of useful security, and how it can be cobble together from unrelated and broken parts.
> Do you also have no password on you wireless connection
Of course I don't have a password on my wireless. Otherwise how could anyone who needed a connection use it? Sheesh.
The only reason to fear someone on your LAN is because you aren't secure. If you job involves deploying anything Internet facing you can't rely on a firewall to keep the bad people away.
>I would really like to see if the people downvoting have any security precautions in place in their daily lives.
Of course we do. I look both ways before crossing the street, I don't burn candles unattended, I fix all visible "broken windows", and I don't use any measures that don't offer at least a fair bit of protection in the given context. Weak layers are a distraction and a problem, to you.
> If so, they are a little hypocritical.
Not at all. You'd probably (hopefully) object if I came to your house and replaced your smoke detector with a unicorn detector and a bad-stuff detector, even though you now had twice the number of security devices as before.
If you understand why you'd object to those you'll start to understand why I object to what you see as security measures.
> ..and if we had no security, would it be any better?
YES!
Than fake security, I mean.
If we had no security we'd know it and we wouldn't take pictures we didn't want seen, or write email we didn't want read. A realistic view is always preferable.