Having read the article, some of it I agree with and some I don't. I would definitely ask people not to allow their dogs to sniff her, but I would also warn her sharply that she is not to react to them. On approach I would say to her 'don't you dare' in a sharp voice, and make her sit or lie down till the dog has gone past or away.
If you do nothing she will think you want her to retaliate maybe to protect you, but you need to be telling her that you are very grateful for for help, but you will let her know when you want her to stick up for you.
By not doing anything she will just escalate the level of aggression until she is going in first whenever she sees a dog.
Find a training class and explain the problem and see what their reaction is. If they say we can help you socialise her with other dogs and overcome her fear/dominance/protective streak call it what you will, then you should be ok, provided you do your bit and keep her well under control.
If they say we can knock that out of her, then stay well clear! Try to find a class that is run by a member of the APDT, google that and you will find a list of trainers.
Doing nothing is not an option, as you will have a very difficult time exercising her if you cannot trust her and control her, which will in turn make her more difficult to handle.