Only if what you took from the public domain is actually taken—as in, no longer available to the public. The scarcity model that we use for the literal commons

Only if what you took from the public domain is actually taken—as in, no longer available to the public. The scarcity model that we use for the literal commons (the shared fields in a village) doesn't apply when we're talking about bits. I think TFA is onto something by pointing out that there are very real ways that some of the recent use of the commons falls into the realm of abuse that harms the commons. But most of the kinds of usage that has people giving up on FOSS doesn't actually fall into that category.