Left the guard clause in, in the end, because of some misguided need to "do the right thing". It's just dead code. I'd just get rid of it now.
Despite online Internet attention, users don't care about this stuff so long as it's wicked fast (response times < 20 ms) and doesn't interfere with the thing they want. They want the thing it enables and they'll happily pay the price.
People online who talk about all this stuff visit whacky sites, get angry at being infected with god knows what from some shit Forbes.com or some crap or some porno site and then flip out at "Google for tracking me" or some crap.
Glad I'm not in that industry anymore. No one outside it knows what it does or enables.