The Twitter app properly communicates when you're geotagging your tweets or not, and allows deactivation using a simple click before you submit. If that's all it takes for privacy, then I'm ok with this. Facebook is much more sneaky. I would be curious to know how many protesters shared their location without wanting to. Witnessing my family of tech-unaware people, privacy leaks is a monster they're all afraid of, thanks to headlines of media, and they often ask "Not to be tagged on fb" or "How can I be sure that ...". Protesters are probably even more conscious of this.