I think this is both a harmful and irrational attitude. Why focus on some trivial mechanical errors and disparage the authors for it instead of the thing that is much more important, i.e., the substance of the work? And in dismissing work for such trivial reasons, you risk ignoring things you might have otherwise found interesting.

In an ideal world would second-language speakers of English proofread assiduously? Of course, yes. But time is finite, and in cases like this, so long as a threshold of comprehensibility is cleared, I always give the benefit of the doubt to the authors and surmise that they spent their limited resources focusing on what's more important. (I'd have a much different opinion if this were marketing copy instead of a research paper, of course.)