Cracking WEP takes a while though, with a ping -f over the network it took me 3 days to crack my own (128 bit ..er, 104 bit encryption) With less traffic, it takes considerably longer. So, WEP will keep out the guy parking in front of your house to steal internet and hack. It won't keep out a determined neighbor within range though. Obviously tunneling is more secure, but the alternative is to just treat your LAN as if it was part of the internet. I don't use telnet to my servers because on the internet anyone can see that if they sniff it. I wouldn't use telnet on the LAN for the same reason, even with WEP. Certainly the 5 minutes it takes to setup WEP does offer some protection, from war drivers. Just not invincible protection.