Hello.

I will now teach you how to down-vote any post in any subreddit that has disabled the down-vote button. :)

This tutorial is based on editing CSS class properties for the down-vote button. The button cannot be removed from reddit but it can be hidden from view.

The button is still there. Here's how you can make it visible again.

Right click on the post up-vote count and choose "inspect element".

Then look for a div with the class "arrow down". That's the down-vote button. Select it by clicking on it.

On the right panel un-check the "display: none" and "visibility: hidden" properties.

That's it! Now the down-vote button should appear.

You don't even have to be subscribed.

Here's a screen-shot of the end result.

Down-vote responsibly and have fun. :)