How do you secure a wireless internet connection?

go to http://192.168.1.1/ in your browser while connected it will take you to your wireless routers controls then its just a matter with all routers passwords are normally admin - admin or something along those lines just jump in and go from there its pretty simple to get in, what makes you feel asthough some one is leeching? are your asked to put in a password when you connect wep or wpa ect.