Good point Mike. I'd have to assume these were USA specific.
I have photos of my bike pretty much "as delivered" in Australia and there was no sticker on the fork warning of wet weather performance nor was there one on the frame below the left sidecover cautioning against modifying the exhaust. These two stickers didn't appear anywhere on my Aussie delivered bike. Everything else was the same though.
Sydney, Australia. The new leaner, trimmer shed: RE5M, RE5A, GSX1100EX, GL1800/Champion sidecar