One man has been banned for igniting a flare during a Sydney FC game against the Macarthur Rams at Campbelltown Stadium last week in a game which saw one man knocked unconscious and a six-year-old boy hit with a rock.

Another man was banned after lighting a firework on Wednesday night in a game involving A-League new boys Western Sydney Wanderers and Sydney United at Edensor Park.

The bans imposed apply to A-League, W-League and national team matches played in Australia.

A third man will also be banned for a period yet to be determined following an alleged assault during the clash between Sydney FC and Macarthur Rams.

Outgoing FFA chief executive Ben Buckley said the bans demonstrate the governing body's zero tolerance approach toward anti-social behaviour.

"The troublemakers who bring the game into disrepute with their reckless behaviour have no place in our game," he said in an FFA statement

"The incidents at Campbelltown and Edensor Park over the past week were the work of a few idiots who wanted to cause trouble."

Buckley also said he hopes the sanctions will go some way to improving the atmosphere at A-League games as the start of the new season edges nearer.

"Football at all levels will spend whatever time and effort is required to ensure matches are played in a family-friendly atmosphere where people can enjoy football," he said.

NSW Police have confirmed further investigations will take place into the incident at Edensor Park.