Sometimes the stand is a visual reference point that they can use to find their friends. "We'll be at that pole in the middle!" It helps when they stagger back from the bar in the dark, etc.
I had a great example of that at an outdoor Yonder show, in the middle of the crowd. It was just the Zman and I (obligatory Zman reference!). After the opener we decided to move forward. Part of the intent was to get better sound, and also hopefully be surrounded by people who were more into the show. I tend to think people at the back are more casual and less into the music, etc.
Anyway, these folks who were near the stand were in a bit of a tizzy and moved with me. I was a little wtf? And they said they were using it as a reference marker with their friends. It was a bit of a rough show, and they did help with the blocking.
How about the people who, when you are trying to block, try to insist on cutting between you and your stand? I guess the theory is that it is easier to squeeze between one person and a fixed object, than it is to squeeze between two shoulder to shoulder people. Yo, bro - I am a Mama Grizzly, and that stand is my cub. Do not try and come between us!