"Waving protest placards and flags"?
Do you honestly think TF would allow them in?
Do you not recall all the H&S issues over fire certificates at the Ricoh - although oddly, it didn't seem to be an issue at the charity game........
Your comment made it sound that the protest was a failure as SISU didn't decide to move back to the Ricoh, while they had their halftime cup of tea.
As many have pointed out - this will take time.