The lakes in our neighborhood have a 6-8 foot concrete lip, but there is also some underwater structure in place. The pieces look like parts of lawn chairs, with weeds growing on them.
The aeration from the fountains is enough to keep the lakes from getting too hot.
I've only seen one lake get a fish kill, and that was from a fire ant control gone badly.
There are no fish feeders but there are enough people feeding the ducks that the fish get dog food and bread on a routine basis. I'm pretty sure that the larger bass and catfish supplement their diet with ducklings. Once the water warms up a little we can catch LMB, catfish, bluegill, and the occasional crappie out of the ponds within walking distance.
The major challenge is your back-cast. Pedestrians take a dim view of you hooking their poodle, or kids.
I generally take a 3-5 wt, or my spey rod, along with a selection of favorite flies, and spend a few hours walking and casting.