Au contraire, syag – the rude one here is the op who feels it necessary to meddle in others’ business.
As an aside – Rabbi Abadi bases his psak on very mainstream rabbanim (did any of you ever hear of R’ Moshe?).
Cinderella – are you really speechless that there are others who have different religious standards than you? While you may have thought you were doing her a favor, quite frankly it was none of your business.
72 – I can’t comment on your specific experience, but there are those who hold that FDA is enough supervision, as any company that doesn’t follow their guidelines to a tee faces very large fines. As such, some rabbanim hold that that is sufficient.