Interesting question which I've often wondered myself but never asked
For me the answer is no:
- Exploring is like driving. A potentially very dangerous activity. I want to be in control, aware and alert at all times.
- I already carry water for hydration purposes, and heavy photographic equipment. I need to keep it as light as possible to be able to climb things.
- Drinking alcohol means ending up with an empty container. Which I would have to take with me. Which would waste a lot of valuable space in my backpack. There is just no room for alcohol.
However I'm a London explorer, going out mostly at night, climbing fences and scaffoldings, dodging security and cameras. I can imagine it could be a totally different story if I was walking into a abandoned factory with no fences or security in the countryside on a bright sunny Sunday afternoon with no driving involved afterwards. Yeah, I can see myself bringing a bottle of Pinot Noir along.