This actually happened to me a few months back. There’s plenty of ways to get to the Hollywood sign, and in December when I was there, the way I’ve always gone up before was seemingly blocked off by a security guard who told us that the sign was closed. What I didn’t know at the time was that that security guard is just there for appearances. Telling people to go elsewhere, but not really able to prevent you from walking right past him. Sucks. I should have guessed.