That is crazy! I agree with Julie S.! I can't believe you live in a gated community and are having this kind of problem, thats really ridiculous.
I would take it a few steps further with talking to management, perhaps even contacting above management if you can.
This is something close to my heart, because I rehabilitate and foster all of the "bully" breeds - American Bulldogs, Staffordshire Terriers, basically "pit bulls" or mixes of the two. This makes me so angry because owners like the ones in your area are the ones that are really screwing up!! So many dogs get put down because of their stupid owners not being responsible!! Personally, I would talk to your neighbors face to face and explain that you are afraid, concerned and very uncomfortable with their animals walking unsupervised. Its worth a try. If nothing else ...contact anyone you can and request a little community "back up" to help these people realize that not everybody loves dogs and is comfortable around them.
As for what to do:
Do not look in the eyes.
Do not approach (obviously)
Do not speak.
DO NOT RUN. Don't pick up your pace either.
Place yourself into a safe state of mind, don't let your anxiety show if you can help it - watch your body language. Breathe deeply and concentrate on taking one step at a time in your normal walking pace.
If you are going on regular walks, you need to continue to take your pepper spray because it is somewhat effective in that it can disrupt their vision... and make it easier for you to get away. However, you need to take a walking stick or bat with you... something sturdy and large - even a tennis racket will to. Use this to create space between yourself and the dog if it is approaching you in an aggressive manner (tail up, or teeth showing, or both... look for a stiff tail - that comes before teeth). And of course, if you are being charged, defend yourself with it.
Whatever you do, don't run and don't speak. Speaking does nothing. They don't understand you and the only thing you will be communicating is your tension through a shaky or unstable voice/breath.
Remember that dogs are not as aggressive as you may fear them to be. Mostly they are extremely curious... and mostly they are responding to YOUR demeanor. So try to remain calm and controlled. At least long enough to get safely indoors.
*Most* dogs that are pets, probably like the ones in your neighborhood, are just curious about you, and you may be mistaking aggression for attentiveness. If a dog is alert, that does not mean he is aggressive. Just because his ears are perked and he's staring at you, doesn't mean he wants to hurt you.
HOWEVER - if there are dogs in your neighborhood of "bully" character - boxy heads/faces, very stocky, very muscular, you need to be much more adamant about this situation. If you're just around a bunch of Labs and a few mixed breeds... I wouldn't be too worried, but if these owners have bulldogs of any kind they need to be made more aware of the danger of allowing these breeds to have that much control over their territory. A pit bull is naturally more aggressive than other breeds, they are much stronger and much more tempermental if not properly and carefully trained.
ALSO - if these dogs are Rottweilers or German Shepherds... use the same caution. Rottweilers have the strongest bite pressure and are as tempermental as the bully breeds, and German Shepherds are extremely over protective and can be very territorial.
I hope some of this helped. I wish you the best of luck, and I do hope that everything goes okay. Please know that not all of us dog lovers out there are that stupid... most of us realize and respect dogs as animals and not humans....
Hang in there!!