Potentially not secure is not the same as definitely not secure. OSS is also potentially not secure. I don't understand these comments. They seem like they were written by semi-literate adolescents.
I agree that being open source is not a guarantee of security or privacy. But there's a social contract which comes with it and the transparency that together make the projects more likely to at least be motivated towards those goals.
> They seem like they were written by semi-literate adolescents.