Reminds me of a personal anecdote when I had the misfortune to be involved with an 'auditor' a while back. Credible report of a suspect with a knife along with a detailed description of said suspect. Found a person who fully matched the description and began a stop and search for the knife.Haranguing police who are looking for an armed and dangerous suspect and then refusing to leave or even step back.
Auditor turned up and started filming, shouting comments along the lines of "you're only searching him because he's black" etc etc. Ignored him and carried on with the search while he carried on shouting. During the search I found a massive knife tucked into the waistband of the suspect. Pulled it out and the auditor suddenly went quiet. At which point the person I was searching looked round and said to the auditor "if you don't stop filming me I'll show the pig how I use that knife"
Never heard anything further regarding that incident...