I wonder if this random string of words (now present on sites with higher reputation, like HN) will feed into spam training systems, and now it won't be spam.
No, the gtube string (GTUBE-STANDARD-ANTI-UBE-TEST-EMAIL) is a special string made for testing anti spam systems (there is another for antivirus systems). That's the only part of the block of text that is going to work 100%. The rest looks like filler.
Anyway, you cannot (shouldn't) train a system to accept the gtube string).
