I had the Glastonbury experience a few weeks ago for the first time. I can check that one off my bucket list. No one told me to bring wellies; I thought - it's summer, why would it rain? I ended up impacted in mud having to beg passers-by to help me lift my feet.
The idea of what's acceptable to say onstage or in any other public arena, particularly in the name of comedy, is unclear. The public consensus seems to constantly waver between a belief in free speech for all and being as politically correct as humanly possible.