Do I have to call back?

What are the personal ethics involved in responding to misdelivered voice mail?

Some poor woman named Mrs. Lowry is under the impression that I am her apartment building super and has left numerous -- and graphic -- messages concerning her clogged and overflowing toilet.

Am I under any moral obligation here?

And how come I never get errant voice-mail messages from really cool people?

UPDATE By now, Mrs. Lowry's plumbing issues should be resolved. Direct all kudos to Mr. N.