Got dead air

These people call and never leave a message.  Tired of whoever it is.

Called asking permission to send a prepaid envelope for donations.Did not recognize which organisation.

Same as above, calls and does not leae a message. Another basic intruder.

I am sick and tired of these calls.  Knowing that do not leave messages, I decided to answer the call but said nothing.  The person at the other end said hello a couple of times.  Since, they did not get any response they hung up.  In some ways, I enjoyed getting them back.  Oh well, it made my day!  :)  I think I will do that again, if half to.