Following on from their silent protest earlier this month, fans groups have written to the Reds management seeking a range of measures.

Among them a negotiated Supporters Charter agreed to by the fans, the club, stadium management and South Australian Police prior to the start of the 2013/14 campaign.

Despite the extraordinary success of the A-League this season and Adelaide’s strong position on the league table, AUFC fans say they have “never felt more disconnected and disillusioned with the club”.

It is yet another potential flashpoint for the club which was rocked by the sudden resignation of coach John Kosmina on Monday. Only last week Adelaide United settled a damaging lawsuit with Kosmina’s predecessor, Rini Coolen.

Reds fans have been scathing of what they see as apparent indifference from the club’s leadership in the face of heavy-handed stadium security.

They have increasingly expressed dismay at the level of fan engagement and the overall direction of the club.

During the Reds round 16 home clash against Perth Glory supporters staged a silent protest giving the club owners a taste of life without active support.

For periods of the game the stadium was eerily bereft of the usual fanatical support, signifying that no one from the club was listening to fans.

The protest failed to elicit any response from the club, and active and non-active support reps met recently to discuss their next step.

The letter signed by the various groups and forwarded to the club on Friday also called for the promotion of active support via avenues such as Facebook.

A post on the We Are The Reds website described a public fans forum as “long overdue”.

“Football without fans is nothing – it is uniquely the only sport with truly thrilling, hair-raising and electrifying atmosphere,” the letter stated.

“It is the underlying passion of these albeit dissatisfied fans that drives the growth of the game in our city and state, and helps make Hindmarsh a fortress for Adelaide United.”

The letter was signed by representatives for the Red Army, Red Terrace, Adelaide United Members Club, We are the Reds and the South End.