Just use the new client to send your coins to a new wallet. Leave the dust spam in your old wallet and throw the wallet away and forget that you actually own those coins because they are worthless anyways.
Remote coin kill switch? So 1 person decides about protocol changes, and that I can't use my coins anymore? Seems like some things that people criticized about SC2 are now happening at LTC
But I know, that's a totally different story...
Um...
If you really need to spend those coins, you can start the client with "-mininput=0.00000001"
The point is spending those coins will slow down the client right now b/c it takes forever to collect enough 0.00000001 LTC to make up a large enough value to send. So I changed the create transaction code to ignore these tiny values by default to speed things up. If you really want to spend them and wait forever for the client to create the transaction, you can by passing in a tiny min input.
Don't try to start a controversy when there isn't one. Please just go back to solidcointalk.org.