Hi Robert,
There are 2 kinds of social media links. Links for sharing something, and links to profiles.
These social media links are for sharing a guestbook entry.
If you want profile links, you probably want another plugin. Showing your profile links would only need to be done once on a page, not for every guestbook entry.
Unless you are talking about visitors sharing their social media profile in a meta field. But I think an extra field can be used for that.
Regards,
Marcel