The Irish Football Association has warned players and officials that they could be punished for comments made on social networking sites.
An increasing number of Irish League players are using sites including Twitter and Facebook.
The IFA has now issued guidelines.
"Any comments which are considered improper, threatening, abusive, indecent or insulting can bring the game into disrepute and may lead to disciplinary action," said the IFA.
"Comments which may be considered as offensive, use foul language or contain direct or indirect threats aimed at other participants are likely to be considered improper, and will be subject to the Irish FA's Article 33."