lc: Lior, if the person asking holds that chalav stamm IS kosher ( and there are many poskim to rely on ) you can tell him.
PP: Others can feel free eating there because:… Rav Moshe…
No. One can’t eat something because there are poskim to rely on when his own posek holds it is treif. And if his own posek holds cholov stam is not kosher (as various big poskim maintain), he can’t suggest, facilitate, direct or feed another Jew cholov stam (even one who holds of the very valid shitta that it is not non-kosher).
Much as someone who holds an eruv is not valid, cannot suggest, direct, ask or facilitate another Jew to carry on Shabbos – even if that other Jew and his posek holds the eruv IS valid.
apy: that is a gross violation of DD policy and should be reported to DD.
It is highly doubtful, and certainly not a given, that DD will do much even if it were reported to them. A single incidence of warming up a personal sandwich in the microwave doesn’t rank on top of the things that the franchise company headquarters in Massachusetts will worry itself with or throw out the microwave because. And certainly not without strong evidence, such as a video.
apy: whose employees are usually non jews.
PP: If you think that a store owned by a shomer shabbos is not susceptible to employee (or chas veshalom propreitor shaningans)you are fooling yourself.
A Jewish owned food establishment is far more likely to care and be responsive to kashrus violations by its non-Jewish employees (who are less likely in the first place to be preparing the food) than a non-Jewish owned food establishment, let alone one open on Shabbos.
zd: Dunkin Donuts like that, the ones that are Kosher have normal Hashshchas (Like the O-k)
DD, at least in NYC, does not have a national hashgacha.