I can say that it's been fairly standard for me to be interviewed (a few times in one case) and then having the firm never contact me again, and not even answer

I can say that it's been fairly standard for me to be interviewed (a few times in one case) and then having the firm never contact me again, and not even answer a brief email asking about progress. This in marketing departments for high tech firms, mind you. Clearly, they a) don't care, and b) know they can get away with it.