That's how I know it's real. If they don't leave a message they don't care enough. The only people I want to talk to are like my doctors offices. My friends and family text and message.
I literally ignore all unknown numbers. I also ignore the doorbell if I don't expect someone or something. If it is important then just send me a letter.
One of the greatest moments in my life was when I was a young adult and realized I could just ignore someone at my door and leave them standing there. I didn't invite your ass to just show up so fuck right off.
Phone calls too. You better ask via text or something first if you expect me to stop what I'm doing to listen to your bullshit. Voicemail? Oh no, I never completed the setup so you can't leave a message. So sorry!