No they don't.
We used to go to an annual picnic at my cousin's house. The invitation would come through my father, no one ever contacted me directly. I was putting up with it until the one year my father told us about the picnic and I asked him what time it started and he said noon. I didn't want to be the first to arrive so I planned it so we would get there around 1. Turns out the picnic didn't start until 3pm and they were very shocked to see us there so early. After that I did have a discussion with them about inviting me directly and I think that worked for one year.