Rogues of Clwyd-Rhan now has a social media bar for easy sharing through Twitter, Facebook etc. My criteria for a social media bar were that it needed to be visually discrete - i.e. no filling the entire width of a screen and no sticking to the bottom as you scroll - customisable and not too free with users' personal data. So far, Add to Any's bar seems to fit the bill. It's easy to install and customise, can be made compact and does not appear to draw its image files directly from Facebook etc's servers.
However, it pays to be vigilant, and I just found this, which I shall fix in an instance. But with that out of the way, the benefits should outweigh the disadvantages. Please let me know if there are other aspects that I need to look into, or if you think there are better alternatives available that fit my criteria better.