Crystal Palace manager Alan Pardew has called on the club's supporters to use social media to report anyone caught throwing coins, allowing him to focus on picking a team to beat Arsenal on Saturday.
Unsavoury incidents in Palace's last two home games have seen missiles thrown towards opposing players, with Newcastle captain Fabricio Coloccini caught on the face in his side's 1-1 Premier League draw last week.
Newcastle boss John Carver (and Palace) condemned the actions, but another misdemeanour is reported to have occurred during Saturday evening's FA Cup fifth-round 2-1 defeat to Liverpool.
The spotlight will be on the behaviour of home fans when Arsenal visit Selhurst Park on Saturday, and Pardew does not want to see any further repeats after the club insisted they would ban anyone caught in the act.
"We take a zero-tolerance approach to this sort of behaviour and, if the perpetrators are identified, they will be banned indefinitely from the stadium. If they are season ticket holders their cards will be made void without a refund," a club statement read.
And Pardew echoed such comments when questioned during his news conference to preview the visit of the Gunners.
"It is a big concern for the football club because you don't want it," he said. "But for me, the manager, I just want to prepare the team so it is not high on my agenda. I hope it stops because it's something we want to take out of the game.
"We've had two incidents and we need to stamp it down and that's what the officials at this football club will try and do.
"Absolutely [a ban is justified]. I think the first time a coin is thrown is maybe the heat of the moment but to do it twice is stupid and we can't accept that at any level."