Option Explicit usage

Option Explicit is useful for debugging scripts - but should you include it in finished websites? It's handy when testing your page but should you leave it in or take it out when you upload to the server?
Does the server use more/less resources or read the page faster/slower with Option Explicit?
I just noticed I had it still in my site's headers, not sure if I should take it out.

and man how much work it will be to delete Option Explicit on top of all pages when uploading and put it in place again when editing 

...and now with VB.net, you also have "option strict" which, coincidentally, is even stricter than option explicit. it makes you write out all your code, with not much room for shortcuts.