[3] - he does express worry over the risks of open models -- much as he has long expressed worry over his own models (and AI safety was the primary reason for Anthropic's founding) -- but he does not even imply that they should be banned, and he even explicitly says there is nothing that can be done to stop open models from being distributed.
For completeness's sake:
[1] The primary linked source seems to also be the 2023 testimony, albeit posted with a timestamp from this week.
[2] Does not seem to quote Dario, nor mention banning - I think you included this as an example of someone else who is explicitly worried about AI risks, including of models that can't be pulled back -- fair enough (although I can't see that they have any association with a frontier lab). If the argument is that many people have concerns about AI risks, including risks specific to open models, and who are not associated with a frontier lab, I agree with you.