Hey ho! The original script developer implemented a scroll-down approach, meaning that scrolling to the bottom of the list causes every single item to load. This behaviour caused me a big problem, since I wanted to delete all my comment likes and dislikes, which were so numerous (since 2018) that, once they had all loaded, my browser simply ran out of memory. The script was unable to execute.
My idea for this script would be to somehow implement a top-bottom deletion approach, without pre-fetching every single activity. At least make that an option to the user.