Living with my grown child and my grandchildren

Is anyone else in this situation?

I am not living off my child. We share expenses plus I bought the cars and pay for insurance. Since covid and going to school online my granddaughters have started staying up half the night gaming and talking to people online or on games, getting behind in their school work.

I have learned over the years that I am not allowed to comment on any of this without creating a big fuss.

My question is that the past 2 or 3 weeks they are now staying up all night and they are not quiet at all. They may be in the kitchen at 3 in the morning getting something to eat, playing music and laughing. The last couple of nights I even heard them going out the front door in the middle of the night.

All this wakes me up and I wind up not being able to get back to sleep. Then they sleep all day. I don't think they should be leaving the house at 2 or 3 in the morning and they even leave the door unlocked. My son doesn't seem to have a problem with it. He just ordered them new gaming computers as a reward for getting caught up on their school work.

I finally blew up at them yesterday. Their Dad was at work. I thought they were asleep in their rooms as early in the morning they asked if they could use my cc to order food. I went to my room and got dressed and went about my morning. I went out to check the mail around noon and I noticed that the door was unlocked. The girls were down the street just coming home. I blew my top and told them they should lock the door when they leave and then I told them to never leave the house without letting me know that they were leaving and where they were going.

They said that they had asked their Dad and I said that I was the one that was here. I told them that I am a person and I live here. Of course they were mad and went on to bed. I texted their Dad and told him I did not appreciate them leaving and not even telling me they were going. He said he would talk with them but he usually just plays it off as I am just a crazy old woman.

I think I deserve a little curtesy. They are treating me like a piece of furniture. Just over a year ago my son and the girls would just load up and take off. I wouldn't know if they were coming right back or if they were going to be gone all day or half the night. I finally told them I would appreciate it if they let me know they leaving and how long they might be gone. Sometimes I wouldn't even know they were gone unless I looked for them. I finally asked them to please let me know they were leaving so I knew to answer the door or check out noises in the night or plan something rather than waiting around on them. They thought I was being ridiculous.

Am I being unreasonable?