A lot of cheese is made without rennet. Hard cheeses tend to still use rennet because it is difficult to get the set otherwise, but we always manage a nice cheese board that caters for strict vegetarians. The shop will always check and tell you.
And I think there is a difference between proper food outlets, that should research and have good information, and private individuals. I would not invite vegetarians if I wasn't prepared to cater properly for them - but in my mind there is a huge difference between saying you've cooked the potatoes in goose fat because you like it (rude!) and not quite realising about isinglass in wine.
I too have catered for a lot of dietary restriction in friends and family, and it is just sensible these days to recognise that the work 'vegetarian' is used loosely. Our Jewish & Muslim guests usually say 'treat us as vegetarian' because it is the easiest way avoid getting tangled up in minutiae!
Halal and Kosher meat should labelling be mandatory?
Does anyone have a middle name?
What "back then" inconvenience would annoy today's youngsters?



surely the definition of a vegetarian is someone who doesn't eat either meat or fish. However, she is vegetarian as opposed to vegan. She's extremely adaptable catering for her has never been a problem for me. I completely respect her dietary preferences. On the other hand one of my sons shared a flat with a evangelical vegan, who did convert my son for a while and like many who adopted the diet he said he felt much better for it. Nevertheless he lapsed back to being an omnivore I think he found the strictures of following that diet too restrictive for his lifestyle. However, the main complaint about the "friend" was that he took control of the fridge he ruled what could and couldn't go in it, which was completely out of order, given I own the flat and the damn fridge in it. My son and the friend eventually went their separate ways and as a consequence of sharing a living space their relationship took a downturn. The friend turned out to be the worst kind of born again vegan who actually approached people in restaurants and pubs if they happened to be eating meat and then delivered them a lecture of the evils of what they were ingesting. This seems to be a growing trend from what I read these days 
