Cameras, and announcer or DJ requests

Hello ATC, I have a couple of questions;

Are CAMERAS allowed into the stadium, what uses and types might be restricted - if any. Video, DSLR, pro equipment?


Second one;
If a fan wished to place a REQUEST for an announcement with the Stadium DJ or mic host, can they do this and how might they go about it?
What if they are already in the stand, and wish to have something read out at late notice?
Can children (or any fans come to that) have birthday greetings or other messages read out?


THANKS in anticipation

1. Basic cameras are fine, pro equipment requires licence and accreditation.
2. Please submit these via customer services, but it's unlikely to happen if it's left until matchday.