I put a keylock on my window and tripwired a claymore to my door. Problem solved.
Edit: In all seriousness, wouldn't it be logical to keep records of all IP addresses that attempt/login to the system. If you frequently see attempts made from one IP address, or IP group (ISP block) then simply prevent them accessing the login.
Further, for Wifi, wouldn't it be logical to record the MAC codes of computers trying to access the network and if one you don't recognize is frequently trying to access the system, simply block it.
It's not foolproof. Actually it probably is. It's not true security against a determined person (proxies and MAC spoofing), but then a good password protects you against fools and often not skilled individuals. A key logger on an insecure computer clearly trumps any password.
In all seriousness, wouldn't it be logical to keep records of all IP addresses that attempt/login to the system.
If you mean specific to WiFi, then no, it wouldn't be logical - often the WiFi access point acts as a DHCP server and assigns an IP. If you mean more broadly, then yes it would - see [1].
Further, for Wifi, wouldn't it be logical to record the MAC codes of computers trying to access the network and if one you don't recognize is frequently trying to access the system, simply block it
No, MAC addresses are trivially spoofable (as you note), and in some cases I believe this spoofing is automated. MAC blocking isn't a real security feature at all.
