Reoccurring events are what led to a determination that signs like that are put up. Do you think the local Gov. was just sitting around and said "lets buy expensive and unnecessary signs and arbitrarily place them" ? Signs like that are put up for a reason. That reason would most likely be lots of other arrogant cyclists who cannot comport themselves in a civilized manner where making life difficult for peds, en mass. I cannot understand why you ride somewhere where you know it is going to be an issue and purposely disturb peds/people.