GP claimed it was "slipped in unknowingly" which is false. Anyone who has paid any attention to the media the past few years knows that trans fat is now thought to be bad (never mind that in previous decades it was considered to be healthy, or at least "less bad" than saturated fat).

I actually do look at trans fat content on the labels quite often. The labels are very simple, it's not like a terms of service that's highly verbose and deliberatly obfuscatory.

If you want to avoid trans-fat, it's trivially easy.