I think we’ve all met ourselves a few dooms day enthusiasts who carry on about the inevitable end of the world. Why they think it will happen in our lifetime is beyond me. They can be very entertaining if not a touch scary. They usually have more than a few conspiracy theories as to how the end of civilisation will come and I try my hardest not to get too involved in those conversations.
You never do know though… there is a very slim chance they could be right so best to not offend them should you one day need to crash their tent village. Best to just nod, smile and move along while avoiding eye contact.