Can I delete useless wireless network?

[mikezang]

I found there are a lot of useless wireless network on my Mac OS Lion as below, can I delete them and never show them again?

 

[GGJstudios]

I found there are a lot of useless wireless network on my Mac OS Lion as below, can I delete them and never show then again?

There's nothing to delete. That's just your Mac detecting wireless networks that exist in the area. The list will change as networks become available or not.