Personally, I don't see much resemblance at all between Queen Anne's Lace and Poison Hemlock. They both have white umbrella flowers, but the flowers are not much alike and the foliage is entirely different.
Now, Wild Chervil and Poison Hemlock, on the other hand...
If you spend time with plants, yeah they arent that similar. But its an easy mistake for people with few plant ID skills to make hence the copious warnings in plant ID resources.