Meno,
Different chumros/kulos was built into my comment. I understand why somebody would refrain from eating other people’s meat dishes, because there is much more area for problems to arise and your standards may not be the next person’s standards.
But for cookies and cakes, there isn’t much area for my standards to be different than anybody else’s, besides for chodosh/yoshon, trumos and maaseros and cholov yisrael if they aren’t parve.