I'm starting to see incoming email with really annoying and utterly pointless images embedded in the subject. An example is shown where I do not really want to unsubscribe from the list. It's far from the only sender. I do not want to see these images as they corrupt and obscure parts of the display around them. I'm also concerned that - in the example - the body of the email carries the message "To protect you privacy, Thunderbird has blocked remote content in this message." However, the graphic in the subject line has NOT been blocked (assuming it is remote content rather than a built-in icon). If a spammer can use personalised subject images this may be a method to find email addresses which are live, despite images in the body not being loaded. I'm using Thunderbird 52.7.0 (64 bit) on Ubuntu 18.04.