We might want to see if they're actually trolls first.
While I know it's pretty de rigueur on HN to assume that anyone who issues a DMCA takedown is evil/a troll/an idiot who doesn't understand the internet, it doesn't mean that some of them aren't being filed because their copyright is actually being violated.
Until there's more evidence either from LayerVault that DesignModo has used their assets, or from DesignModo that they haven't - something beyond DesignModo just shouting "they're lying!" in any case, perhaps it's best to withhold judgement for the time being.
This would be much easier to do if they had included any specifics in the DMCA notice itself or in their public statements since then. Part of the de rigueur reaction is because DMCA actions often lack this kind of evidence.
While I know it's pretty de rigueur on HN to assume that anyone who issues a DMCA takedown is evil/a troll/an idiot who doesn't understand the internet, it doesn't mean that some of them aren't being filed because their copyright is actually being violated.
Until there's more evidence either from LayerVault that DesignModo has used their assets, or from DesignModo that they haven't - something beyond DesignModo just shouting "they're lying!" in any case, perhaps it's best to withhold judgement for the time being.