Your assertion is that it happens to you regularly. Have you considered that it's actually you, and maybe there is a way to express your opinion clearly without getting shadow banned?
> As a developer -contract or fulltime- for the last 30 years, you would think people would listen.
As an intelligent person, one would think you might learn how to adapt your methods of expression.
I also know of occasions where people actually asked for advice on what they are doing wrong and got genuinely helpful responses. Perhaps you could consider that.
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Edit: To the people/person who downvoted - I don't care. I like HN, and I find the comments mostly valuable and the discussion mostly civil. After spending a lot of time on many forums over several decades I've come to the conclusion that this is mostly because of the strong moderation. If people are being shadow-banned here then there will be a reason underneath. They can complain as much as they like, but it's likely that if they don't change then the shadow-banning will continue. If they want to participate, and want not to be shadow-banned, then they need to change their behaviour, and seeking advice is often helpful.
So I stand by what I said, and in replying to the tone of the comment by Cytronex, I stand by how I've said it.