For me it depends entirely on my mood. I grew up in a small town and in a large extended family where there were very few of those kinds of boundaries in place. My house is your house kind of lifestyle with no locks on any doors.

Now that I have my own home I lock the door when I don't want anyone to come in. My truck may be home but if the door is locked the message is clear.

If I do have to let someone in when I am depressed I appreciate that people help themselves to whatever they want. I have neither the mind nor the energy to serve them so it helps me to see them help themselves especially when I am depressed.

I think we are all different depending on our upbringing but either way we are entitled to set whatever boundaries we want in our own homes and if people disrespect those boundaries they need to be reminded until they get it.

If you think their actions are rude then their actions are rude. It is your truth and you are entitled to have your truth respected. That's what I think.