Many deceptive indexes label files as .srt but actually serve .exe, .scr, or .zip containing ransomware. Subtitle files have been weaponized in the past (e.g., the "Subtitle Hack" of 2017–2019 affecting VLC and Kodi).

There are several reasons users gravitate toward raw directory indexes:

Even if you find an index, the subtitles might be for a different video release—DVD vs. Blu-ray vs. streaming. The timing could be off by seconds, making the show unwatchable.