Manly Sea Eagles players believe the fan removed from Lottoland for trying to grab Storm centre Will Chambers on Saturday night should be banned for life.
"As a Manly player that's disappointing to see someone do that to an opposition team," said Origin and Test player Jake Trbojevic, adding that he'd never felt unsafe at Lottoland from over-zealous fans.
"Definitely he should be banned, without doubt. You can't be lashing out at players. That's a complete 'No-no'.
"The security team do a great job and dealt with the bloke pretty quickly."
Centre Brad Parker also called for severe penalties for the spectator. He pleaded for the NRL not to take a finals game away from Manly in week one because of fears security was not at a high enough standard.
"I hope they don't. The incident was quite disappointing from the players' perspective," Parker said.
"I think the security guards handled it quite well and I hope for our sake we get the final."
NRL Head of Football Graham Annesley said the investigation into the incident involved both the Integrity Unit and NSW Police.
"The Integrity Unit is following up with police to try to get more details of the individual involved," Annesley said on Monday.
"As has been the case in many instances in the past the NRL does have the ability to issue banning notices to people, who we don't want to see at our games if they're going to act like that. It's obviously unacceptable.
"That will be dealt with over the next few days. But I'd suggest to you it might be a while before that particular person is back at a NRL game."
Prop Martin Taupau gritted his teeth when discussing Saturday night's incident because of the collateral damage to the Sea Eagles brand.
"That sort of behaviour, is not Manly. It’s just disappointing … there’s a lot of things I’d like to say about this individual and what it’s done to our club. It’s not rugby league in general," Taupau said, before declining to expand.
"I don’t want to waste any air on him, it’s not really worth the time."
He said he would leave it to the discretion of the Integrity Unit to decide a penalty.
"It’s just very disappointing for him to show that sort of behaviour against any rugby league player."
Trboejvic also hoped the NRL would not move against Manly and take a week one final away from the club's famous home ground at Brookvale.
"It would be extremely devastating," he said.
"We love playing at Lottoland – even on the weekend where it wasn't our best performance [against Storm], it was a terrific atmosphere.
"A home final would be great. I really, really hope it doesn't get taken away because of that incident."
Annesley eased some of those concerns in his weekly review of club matches.
"Brookvale is definitely a possibility," he said, reminding fans that not all top-eight positions had not been decided.
"But when we get to finals, regardless of being a home final, they are not controlled by the club but by the NRL. We are the hirer of the venue and responsible for everything that happens, which includes security."
Annesley said there had been several on-site meetings between the NRL and Lottoland's owners to make the ground finals-compliant.