I used to love them when I was little. We'd get a lot on the grape vines and I'd catch them and put them in a fishbowl with leaves and grass in the bottom. I'd bring them into the house for a few days, then set them free. They don't bite and they'd just let me pick them up and crawl all over my arms and tickle.
But a few years ago there was an invasion of Japanese ladybugs around here. They were orange instead of red. I remember going to the beach one day and there were thousands and thousands of dead ladybugs washed up on the shore on the edge of the water. It was really gross! They're gone now though.
Also, if you've ever had a ladybug fly into your mouth they taste really horrible! I'm pretty sure they squirt out some kind of nasty substance so predators won't eat them.