I'm sure we've all had this happen, and this could well be a divisive line in the AR community.
I, as a matter of habit, do not typically return missed calls from unknown callers who do not leave me messages.
I've misdialed phone numbers in the past, and if I get a person on the other end, I simply explain I've misdialed.
I've received misdialed calls on my phone who handle it the same or similar ways.
I do not typically leave a message if I misdial and get someone's voicemail; I kind of thought everyone handled it the way I handle it (a classic faux pas).
If you wanted to reach me, and you get my voicemail, I would encourage you to leave a message, understanding that I may be occupied in some fashion that prevents me from answering my phone. Oh, and my outgoing message says on a daily basis something to the effect of:
You've reached the voicemail of Carol Zingone with Prudential Network Realty. Today is (insert date), and I'm sorry I can't take your call personally at this time. Please leave your name, number, and message after the tone, and I will call you back. Thank you & have a great day.
Now, if my outgoing message were more generic, or didn't identify me as a Realtor, I could see callers not leaving messages.
What's your MO with missed calls from unknown callers who don't leave messages? I'm curious....and I might even call you!