dstiles - 10:17 pm on Apr 19, 2012 (gmt 0)
The problem with JS is that a lot of people no longer allow it: NoScript is very common and I think there are options in other browsers.
I turn JS on perhaps one in a few hundred sites, and then mainly because I want to buy something.
Following the Cutts ultimatum ("let G see css and js or else") I've begun not serving JS (and css) if the visitor isn't human (as far as I can tell). Will ICO / whoever run bot-like tools to "view" for cookies? I can't see them using a human approach to this - far too many web domains. If so the JS solution fails.