DAM Frontend

It seems that only the owner of the file/record can delete it.
What do you think to add this right to the group upload access ?

function delete_document ($uid,$deleteFile=false, $userUID = 0) {
$doc = $this->getDocument($uid) ;
// DSI change check upload access. Relation = 3
// missing other conditions like plugin config dam record resctrictions ?
// but this must be done in checkAccess()

if ($this->checkAccess($uid,3)) {
        $has_uploadaccess=1;
    }

// DSI CHANGE add has_uploadaccess
    if ($doc['tx_damfrontend_feuser_upload']==$userUID || $has_uploadaccess) {
        if ($deleteFile==1){
                // TOOO error handling
            unlink(PATH_site.$doc['file_path'].$doc['file_name']);
        }
        $table="tx_dam";
        $where="uid=" .intval($uid);
        $fields_values=array('deleted'=>'1');
        $res = $GLOBALS['TYPO3_DB']->exec_UPDATEquery($table,$where,$fields_values,$no_quote_fields=FALSE);
        return $res ;
    }
    else {
        return false;
    }

}