If you sign up for twitter or instagram, MAKE A PRIVATE ACCOUNT.
Both of those services are social media and they ---automatically--- make suggestions with your picture/icon INCLUDED about "who to follow". These can be background linked to your facebook or other things and I don't know any way to control this or turn it off. I've seen "suggestions" pop up for people I know in real life, and you don't want that!!
Since you want to see, but not be seen (do you care about "followers"?), just make the account private.
On top of that, on instagram, I don't put anything that would unambiguously point to me.
Apart from these concerns, both services are great. The "twitter heauxs", as they call themselves sometimes, are interesting, witty, and are cleverly establishing a new marketing platform. Of course, it all lacks reviews, but most of them have pee four accounts that often link back to a review site.
Someday, I think this will be a full fledged alternative way to meet ladies, complete with referrals/private "reviews" from their followers, much like PM's on TER serve in the same way.
For now, it's entertaining, and some really hot photos. I've yet to meet a woman simply from twitter, but it has certainly been a component in planning for the future.