The UDA has been told it has "no right" to police loyalist communities after threatening vigilante action against young people involved in anti-social behaviour.
The South-East Antrim Brigade of the paramilitary group warned those responsible for "anti-social and criminal activity" in the Ballymena area "must be held accountable".
The UDA said it "would not stand idly by while our communities suffer".
The statement hit out at "mobs of underage drinkers", describing them as "hoods".
Declan O'Loan, a SDLP councillor in the Co Antrim town, said: "The UDA is a proscribed organisation and has no right, or mandate, to act as judge, jury and executioner."
Ballymena PSNI Commander Chief Inspector Catherine Magee said nobody had the right to take the law into their own hands and encouraged anybody with information on crime to bring it to the attention of police.