Boy The red shirts supported Thaksin and the UDD party, The Yellow shirts, mostly Urban dwellers support the current administration, The blue shirts from what I could figure out are the people in between the to factions bickering and are fed up with the BS. Kind of what it boils down to is a Urban (Bangkok) against Rural(most of the country) conflict. PM me and I can explain it a bit furture if interested.
If you believe the news yes. But why do the common nice folks of Chonburi all have matching silk-screened t-shirts on? Who ordered and paid for them? Why are they intermingling with the Army soldiers? I would believe what you said if they showed up in normal street clothes, but they are way too organized to just be a group of locals like the news is reporting.