No, I don't argue with everything he says on principle.

"Dog owners who let . . ." does not actually mean the dog owners are present, or that they are capable of controlling their dogs to that extent even if they are present.
The dog owners may not be able to control their dogs, but the footie fans should be able to control themselves.
The examples given seem to be of footie fans going out of their way to be obnoxious. The dogs are just answering the call of nature.