To be fair about the GOMAD, he only suggests it for underweight beginners, and only during the very first phase of the LP, when the weights go up very fast. If the person reaches 20% BF, or when the lifts start increasing at a slower pace, he suggests dropping or reducing the GOMAD. So taking all into consideration, the GOMAD would only apply to an underweight person, and only for about 6 weeks.
But he only says this in his clarification. His original recommendation was not GOMAD for just 6 weeks. It could've been up to a year. From SS:
"It is possible for genetically favored individuals, for example a broad- shouldered, motivated kid 5'10" weighing 140 lbs., to gain as much as 60 lbs. in a year of good
steady training, good diet, and milk"
Anybody with excellent genetics, natural, and with hard work, isn't gonna be putting a lot more than 20 lbs of pure muscle in a year, even when starting out (roughly I mean... There's always exceptions) So these people are putting on 40 lbs + of fat in a year. So they get crazy fat. Like you said, it happened so much, he had to write an article about it!
And then Rippetoe has the audacity to tell them that if they got fat with the program, then they didn't do the nutrition correctly and hence "didn't do the program".
The point of the milk was to ensure enough calories, without counting. Fair enough. Do it by consuming extra snacks like Dan John recommends in Mass Made Simple. Start with an extra PB and J daily. If that doesn't move the scale after a week, go up to 2, and maybe even 3. If you're keeping your normal food intake the same (just like you're supposed to in GOMAD), this will lead to similar muscle gains but without the ridiculous fat gain.
They're also infinitely better on the stomach. I still have nightmares from the GOMAD nights *shudders*