Is there a backend option to hide the tags in the frontend?
Or must comment out the line?: printTags('links', gettext('[b]Tags:[/b]') . ' ', 'taglist', '');
Or must use CSS "display:none" ?
You have to either comment the line out or use CSS. There is no option for this. This is theme author decision to use tags and/or and such options. We generally prefer not to add more option than needed (we already have plenty ;-))