I have dietary restrictions that are not due to religion, and anyone who eats with me knows it, if any ordering of food is involved. I try not to make a big deal of it, it's no one's fault, and no one's problem but my own.

I do think it is the responsibility of anyone with dietary restrictions of any sort to either let people know, or not eat anything without asking what's in it. Better safe than sorry.

There are people who will not be happy no matter the situation, greeting card, or whatever - and it usually has nothing to do with you!