It's best to ignore the protesters because they are just looking for confrontation or reaction.
Personally I like having the protesters because it makes them look like fools and it shows how gays are such strong, proud, self-actualized, and powerful community that we invoke fear in others.
In my little town of 6000 people we had 7 protesters at our 2011 pride event. They had a bullhorn, signs, the whole deal. The local police force was awesome and moved the protesters so far to the outskirts of the park that the event was in no way affected.
Strangely, when the protesters got back to their van after spewing their bile they found they had flat tires. Even more strangely, none of the tire shops were able to help repair their tires. I don't know how they ever got out of here, but they haven't returned.