The dollar is affected mostly by the fiscal situation and the latest credit rating downgrade of the Philippine economy. These protesters have nothing much else to do with the way the currency fluctuates.
Actually, I've been following the dollar-peso rate for years. While it's true that our fiscal situation is the main reason peso is at an all-time low, coup attempts and even rumors contribute to its fall. I've noticed that the peso dropped sharply when rumor about a coup was spread. When it was recovering, it dropped again during the Trillanes coup attempt. When it was about to recover, it dropped again when FPJ announced his candidacy to run for president. When foreign investors get cold feet, it greatly affects our economy. During Trillanes coup attempt, I recall the peso dropped 1% during that 1 week alone.