However, sometimes when I get people unsubscribing from my own lists I am occasionally surprised how pernickety and even offensive they can be with their added comments about the exact reason/s why they unsubscribed.
If you don't like the content of a particular marketer's emails, by all means take yourself off the list, but are aggressive, even vitriolic comments really necessary? You can't please everyone of course, and the majority of my subscribers seem satisfied with emailed content.
Are you inclined to answer back to unpleasant emails? Do you say 'Whatever!' and move on straight away? Is all feedback read with great interest?