Full time label reader

Sometimes it feels like being a vegan is a full time job. Ok, maybe not, but if I added up the time I spent reading labels this past year, I'd quit halfway through and go do something way more interesting. However, I feel it's easy enough to control what I buy and eat at home but it's always a bit of a gamble when I go out to eat. Last week I just found out that some restaurants put yogurt in their hummus. I was most displeased. How much leeway do you fellow vegans allow when dining out? Will you take certain items at face value and others not?