Disable likes/reaction individual user

Support
3

Once you install that component that @pfaffman suggested and add the user, you can do this

.group-NAME {

    .widget-button.btn-flat.toggle-like.like.no-text.btn-icon,
    .widget-button.btn-flat.toggle-like.has-like.fade-out.no-text.btn-icon,
    .widget-button.btn-flat.button-count.like-count.highlight-action.regular-likes.btn-text, 
    .widget-button.btn-flat.button-count.like-count.highlight-action.my-likes.btn-icon-text {
    display: none;
    }
}