The five properties of money are:
Recognizability
Fungibility
Portability
Scarcity
Divisibility
By limiting blocksize, cripplecoiners are limiting divisibility. It's not spam. Dust transactions add up. Ask any gold miner selling gold dust.
I buy your product, miners. If it's less divisible, then it's less valuable to me. If it is more expensive to transfer, then it's less portable also and therefor less valuable to me.
If Bitcoin doesn't scale, it will lose market share to an altcoin that does until it is eventually replaced.
Scale or die.