Greetings,
The idea is approximately ot reduce of BitcoinTalk account load in term of space and speed ⏩  on the server and also by implementing the idea will help to save space, money and increase the website load time.
ldeawhile searching for some topic we found many post related to "Banned/Block" user who are no longer part of this forum, and deleting the banned user data/record will save a lot of space and also reduce the record per search term. This will also there will be fewer record in the Database and the query will be expected fast.
Note÷ you can create a backup of files in case ones may need it in the future.