From Arun, August 7, 2013
The letters spell “Security Act”
[These knots refer to a TV political talk show hosted by Dr. Jermsak Pinthong entitled “Khlai Pom” meaning “loosen the (political) knots.” The knots in the letters implies that the government imposing the security act in the first week of August may not help political reconciliation.]
Not the ordinary (political) knots since those knots look more like Concertina knots