Interesting point, no one thought about identifying the weeds. I have no idea even what part of the world kilgore is writing from. If it were my yard, weeds that big might be poison hemlock.
But other than poison hemlock (the only plant I've seen do not compost warnings for - the plant doesn't break down very fast and can stay toxic for several season and the toxic alkaloids can be absorbed through the skin, you are supposed to wear gloves to handle it. In case I have made you worried, it looks a lot like Queen Anne's lace except three times as big and fast growing) does it matter much what the weeds are?
Lets see other weeds in my yard that get really big -- pokeweed, greater dock, some thistles, velvetleaf can get that tall, but it is tall and slender. Many of these are things I let stay in my garden for one reason or another.