A secret message would be clever and if it didn't mean bad things about the software or service provider, I think I might enjoy seeing one. Here I think the message is a not-so-subtle dig at the programmers. Rather than fix a known problem, we'll just include a line in the manual (with a hidden subtext of "and I so hate working for a company so lax about quality, I'll actually put this into the manual even though it could get me fired.")