This doggie bashing in SE23 seems to be mirroring Amsterdam council's proposals for Vondelpark, which also wants dogs kept on a tight leash at all times. But their aim is to open up the park to more diverse er sporting activities in the evening/night.
Of course probably not all SE23 dog oppressors are necessarily 'open air enthusiasts', who, sure (almost) certainly are not going to want any stray dogs around, but you have to wonder if there is a hidden agender here.