I have been going to the area for the past 20 years and have thankfully never been attacked. However, in the last few years, I have seen a large increase of unleashed dogs at that beach in the summer and dogs not being walked properly on the sidewalk going over the bridge, on what is an already too narrow sidewalk to allow for escape from a possible lunging dog. The risk is getting bigger every summer and I’m surprised the city hasn’t taken any action to shield itself from someone suing them.
I found a video on YouTube that shows Del Mar Dog Beach and the sidewalk in question at the 0:06 mark.