I never had that creepiness thing either. Never worry about ghosts, they can't hurt you. It's people I worried about. I've encountered many homeless people, never had an issue with them. Just been respectful. One guy I encoutered in a place kept on talking about the "bit of wood" he normally had. "Yeah I normally have a bit of wood to look after myself but you guys seem okay. Yeah I normally have a bit of wood. Some guys give me trouble but I normally have a bit of wood."
Yeah, we dubbed that place "bit of wood" after that.
Other homeless people don't mind a chat. Some just want to be left in peace.
Back in the old days of city power we were exploring the front bit when we heard some noise so we ran out of there as fats as we could. We realised later it was a homeless person who was probably just as scared of us as we were of them.
I do get claustraphobia and anxiety in drains and tunnels when I am a long way from the entrance and fear what would happen if I injured myself.