If it's so insulting, stop subjecting yourself to it. Let me guess, white boarding is even more insulting, because don't they understand a developer of your exp

If it's so insulting, stop subjecting yourself to it. Let me guess, white boarding is even more insulting, because don't they understand a developer of your experience can't be bothered to prepare for it? No one owes you anything. If these companies display poor behavior during the interview process, add them to a list, name and shame, whatever you think is appropriate and move on.