The wep and wap is almost easy to crack and there is alot of hacking guides.

Therefor i use the mac filtering + wep to give the hackers hard time
Sorry buddy, but once you get the mac address, that can be easily spoofed (though it take a little more time to get it) and then just use wireshark or cain and abel to sniff your traffic and speed it up so you get enough packets, then bam. byebye wep. you may want to switch to WPA..

Oh, and default router passwords will kill you... And don't forget causing a hard reset sets it back to default password.