To expand on Lois's point, and to offer a possible corrective:
I think the issue is really a rhetorical one with Jesse's post. He acknowledges that he's not blaming communities, and acknowledges his habit of going "all in." This is the real meat of his post -- a reflection on setting priorities and boundaries in his own life, and encouraging others to do the same. The line about community that "keeps taking and taking" seems like an unfortunate slip into blame-the-other, in a post that is overall more introspection than social analysis.
That's how I see it, anyway. To bring the discussion back to WTD, I only sort of agree with Eric about communities needing to set boundaries -- ultimately it's up to the individuals in communities to set those boundaries, as Mike says. Although Eric does a brilliant job of keeping WTD's efforts and expectations at a human scale -- but again, that's an individual's contribution to the overall culture of the community