Couple of years ago, granted the weather was good
After doing the 3 lochs way I made my way back to the train station at Arrochar, I met 2 lads from Govan who had climbed (the told me this) The Cobbler and the 2 Munros, they were wearing jeans, T shirts and trainers and had a poly bag each containing they're carry out which they had drank at the summits.
They just fancied a wee day, I did think fair play as I had, rucksack with 1st aid kit, waterproofs etc and there they were burnt to a crisp but had obviously enjoyed themselves
Least they brought their empties back with them