So I was bored and wanted to do some zombie coding so I made this little user script that temporarily replaces the media for posts tagged with epilepsy_warning or sound_warning with a placeholder. I'm probably not going to use it myself but maybe someone will find a use for it.

http://pastebin.com/WgnTLmRp

Qmannn said:
This seems like it'd be useful for those times when I forget to lower or mute my volume. I may try to alter the code to make this work for all posts with tagged with sound.

I made a small update so it a bit more extensible in case you want to add more tags, should be a simple matter of "copy-paste-edit" now. I guess one could even incorporate the user's blacklist into this as well with some workarounds (IIRC blacklist only works on indices and not if you go to a specific post).