I've seen it. I was just mentioning why all Rugers have that, for those that didn't know the reason. (The 8-shot .357 Redhawk snubbie has a similar "Read Instruction Manual, Newport, NH" on the bottom of underlug in fine print.)
They seem more willing to follow the letter rather than the spirit on guns that are at all "limited production" or similar
EDITED TO ADD: I believe the "CAUTION: Capable of firing with magazine removed" found on some Smiths is a similar product of litigation.