It seems a stretch at 10+ years to call this actionable. That is, the DMD is a part with moving parts. It does wear out.
There are tomes on the web about it such as http://ia601902.us.archive.org/29/items/gov.uscourts.ctd.87673/gov.uscourts.ctd.87673.docket.html but what action are you asking about?
Bob
I saw that there was a class action lawsuit that Samsung settled on for some of the DLP TVs, however it seems that the HL61A650 was not listed on that lawsuit. I'm not even sure if that lawsuit had to do with the white dots but more on the shadow effect. My TV has tons of white dots on the screen.
I reached out via Facebook to Samsung Support and was told that this specific model I have wasn't affected by this issue. I was told that the white dots are part of the day-to-day use of my TV. Not sure why I would be told it's not affected by "the DLP issue" but the costs for the fixes would be my responsibility.
Was there any class action lawsuit filed for this specific model for Samsung? I am considering collecting names/information from people affected. Thanks in advance!

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic