Sentence:  Its basic tenet was to say that if those Arsenal supporters who <WSD>barracked</WSD> the board at home games could do any better, let them come forward, put some money in the club, and have a go at being directors themselves. In short, ‘Put up or shut up', which, of course, only encouraged Johnny and One-armed Lou to heckle the Arsenal board even more. Dear old Dennis, he had no idea the <WSD>barracking</WSD> he and his fellow Arsenal directors suffered at every home game came from Spurs supporters. 
Meaning of the word marked with <WSD> tags:  To jeer and heckle; to attempt to disconcert by verbal means.