Where’ve you been? That was a huge fad on YTMND months ago, just do a search for “not guaranteed” to find all the spins offs.
“safety not guaranteed” is now in the historic list of YTMND fads that include Picard, “O RLY”, “Secret Nazi garden”, Brian Peppers, “Internet, Lol”, Barrel Roll and Yiddish Cup… just in case you were going to post more fads 😛
Do love YTMND though, some of the guys there have a very slick sense of humour.