Like I said, you can level the argument at all kinds of research, but it doesn't make it invalid, it just means that you should be aware of it's limitations.
In academia there can be seen the view that "only my research is valid, and those of the people that support my view". I and others can be guilty of such generalisations
The original response to the post was highlighting some of the limitations of the methodology used. There can be a confusion on such limitations and what that means for the weight of evidence.
In simple terms a Mori Poll should not be placed alongside of a website poll as equal weighting. They both produce data but not in the same way, with the same internal validity.
What I see happening (and this is way beyond the issue with SISU, CET, ACL, etc) is people grabbing the data as a sledge hammer of truth, when in reality it's not even a toffee hammer of opinion. Where there needs strong caution of conclusion, there can be weak expression of limitations of result instead.
This all leads to more arguments and more division, and no one can be certain that what they are holding is the truth.
The other issue of CET reporting the results, I don't see the point in a major "breaking" story based on the quality of the poll. I do hope it is not sold as such, as it just adds poor weapons to either side, depending on who wins the vote. As an additional sentence in any of the numerous CET stories it might find a place. It just doesn't deserve its own story.