continuously calling not leaving a message?

This number calls me, I answer and it disconnects about 4-5 seconds later.  I've seen other message boards say this is PETA, which makes sense since I donate to them.

I seriously doubt this is PETA.  I've donated to them for YEARS and never been called. Either it's a spammer using their name illegally, or trolls on the message boards purposely trying to give PETA a bad name.  PETA is very effective at pressuring big evil corporations to stop torturing animals as a means of "testing" their products, therefore the big greedy evil corps spend lots of money to discredit PETA.  This has been going on for years.

Don't know who this is. No indication on caller I. D. No message left; can't be too important.

My caller id said Peta.org, no message was left.  These idiots are calling on three different numbers, must be that time of year again....