Read Thread: Spoiler tags?
Well... yes and no. Just hovering a mouse cursor over the spoiler is enough to get it to show. Since things like smartphones don't have a mouse, you can tap it (or with a keyboard, move the focus to it) and it'll show. But it only takes a single click to activate a link.
The failure there was that the link wasn't actually hidden in the first place because of the cascading nature of CSS and it wasn't a scenario I had thought of. That should be fixed now, but you might have to do a "refresh" to force the CSS to update to the new version.
But it still only takes one click to activate a link.