A quick, easy and cheap way to reduce the likelihood of bike theft

You can lock your frame and both wheels to Sheffield Stands but only the wheel to 'wheel-bender' stands. Why has the management of the Elephant and Castle Shopping Centre left these theft-inviting racks in place, given there are now a large number of conveniently located and more secure Sheffield Stands? I think the shopping centre management are almost as responsible for the theft as the person who took advantage of their slackness to steal most of the bike. When will they remove them?

I would also like to know why the police and PCSOs who patrol the area haven't demanded the shopping centre's management remove them.