Everton have told supporters they could have their season tickets revoked or face lifetime bans if they do not comply with the club's guidelines around fan behaviour.
The Blues have issued a new statement regarding the issue after Tuesday evening's 4-1 home defeat to Brighton & Hove Albion ended in difficult fashion with a smoke bomb thrown onto the pitch.
But the message also covers a range of other potential issues including pitch invasions, throwing of items and harassment.
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Publishing the statement on their own website, Everton said: "Everton Football Club wishes to remind supporters it will continue to take a zero-tolerance approach to pitch encroachment, discrimination and harassment, the use of any form of pyrotechnics (including smoke grenades, smoke bombs/canisters and/or flares) and the throwing of items (including plastic bottles and coins) on to the playing area or among the crowd, inside and outside of Goodison Park and at away stadiums.
"Following a smoke bomb being thrown on to the pitch during Tuesday night’s home match against Brighton & Hove Albion, the Club has reaffirmed its commitment to the Premier League, FA and EFL’s collective stance in tackling anti-social and criminal behaviour at football matches and is required to work with the authorities to identify any individuals who take part in such unacceptable behaviour.
"CCTV is available to both the Club and law enforcement authorities and can be used as evidence in enforcing bans and criminal prosecution in the days and weeks after any incident has occurred, regardless [of] whether any perpetrators have been detained on a matchday or not.
"Any prosecution could result in a criminal record, which may affect current and future employment, or for young people current or future education opportunities. In some cases prosecution could result in a prison sentence.
"The Club also imposes its own sanctions, such as revoking season tickets and imposing lifetime stadium bans, on any supporters found to have engaged in anti-social/criminal behaviour at any Club matches whether at Goodison Park or at any away stadiums.
"All supporters are urged to understand that if the Club fails to comply with Goodison Park’s Ground Safety Certificate, the Club will face punishment which could include a partial or full closure of the stadium to supporters."
Everton were fined £300,000 by the Football Association after supporters invaded the Goodison Park pitch en masse after the Blues' come-from-behind 3-2 victory over Crystal Palace last season, a game which secured their Premier League survival.
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