As far as I'm concerned, other 'realities' may exist or they may not. Certainly we all have our own view of reality. For me, some kind of evidence helps me to define mine.
If I lived near any of the sites you'd mention, I'd be happy to try turning a site on. I'll admit I'd expect piss-all to happen, but I'd give it a try. I'm not gonna travel miles to a site specially tho!