Traders are worried that a march later today in Belfast could affect business on what should be one of the busiest shopping days of the year.
A children's walk, Christmas party and Santa planned by a charity for youngsters with heart disease have already been cancelled.
Ulster Unionist Party leader, Mike Nesbitt MLA, called on protesters to stop now.
Anyone who attacks a police officer, anyone who riots, anyone who engages in illegal street protest, is disrespecting the values of the Union flag.
Stop now. You are losing the argument.
More top news
Peston on Sunday, a new live current affairs programme hosted by ITV News political editor Robert Peston, begins this this weekend.
Leicester City's players and fans are celebrating after winning the Premier League - but how did they claim their first top-flight title?
Jeremy Corbyn accused the media of being "obsessed" with his leadership and insists Labour will not lose any seats at Thursday's elections.