I have a Gmail account and after growing tired of even seeing the unread count in my Spam folder, I added a little bit of code (using 'script<dot>google<dot>com') to check the raw content of any unread spam messages for certain features and delete them automatically. That gobbledy-**bleep** you see is encoded text that the email client will interpret for you (also helps to get past the spam filters), but the headers containing metadata about the email aren't encoded, so that's where my code will work.
For instance, many of these emails have 'unsubscribe' links (definitely never click those!) that point to something like 'storage<dot>api', 'bit<dot>ly' or similar. I also delete any links with a Russian domain or certain generic text, and I continue to add to a list of emojis (lips, moneybag, pointing hand, etc) as they often appear in the subject title, particularly for deranged & desperate people "in my local area" who are keen for a hook-up, apparently.
Of course, if you're using a BT Internet account then this approach is probably of no use to you (unless they provide the means to execute a routine on your inbox?).
