freitasm:

 

Six things:

 

 

1. People using my email address because they either lie on a form or don't know what their email address is.
2. Companies sometimes put the Unsubscribe page behind their Web Application Firewall (WAF), and a rule blocks access from outside their country.
3. Companies that don't automatically fill out the unsubscribe form with the email address so you have to type it.
4. Passive aggressive questions like "Why are you unsubscribing?" and one of the options is "I did not subscribe or I don't remember subscribing to this list" when they should be separate options. 
5. Companies that put a "Unsubscribed by mistake? Click the button to subscribe again" after the confirmation
6. Companies that send an email confirming your removal from the list.

 

Here is a couple to add that happens to people that fall for this (not me, but someone I know!):

 

1. Companies that say we will send you a receipt to your email address, and then bombard you daily with most annoying marketing.
2. Then they don't provide anyway on these annoying marketing emails to unsubscribe!