Subtitle offset at server instead of client

[theshoeshiner]

I have seen subtitle offset features implemented in some of the JF clients, but out of curiosity, is it not possible to implement this on the server? If a subtitle file is 10 seconds off, it stands to reason that the user would want it synced regardless of the client. Could the server not handle retaining this config and adjusting as necessary, requiring no changes to the clients? Or are server level changes just avoided?

I've checked out the code but before I waste any time (I'm a Java dev so there will be a slight learning curve) I wanted to check if this is impossible or unwanted.