Actually, I may have been the only one to have seen it, or at least until I rebroadcast it, thinking that it appeared to have come from Agoracom.  It looked like a legitimate, but annoying header. 

I have Norton (it found nada) and then used Malwarebytes/AdwCleaner as I had seen some anomalies and other strange things while exploring autobus transportation south from Arizona into Mexico.  Adwcleaner made short work of it.  It is free and I have found it quite worthwhile over the years

Sorry 'bout that.

If we had only had that fence! ;)