1st approach is to define the proper public viewable information. Go to the Account -> Privacy Settings and select Custom Definition. Recommended to set it viewable by friends only. Meanwhile for Connecting to FB, you may set it according to your preference depends on how many info (e.g friend list, education & work, current city & hometown etc.) you wish to reveal.
Next is have a proper friend list maintenance. You may have plenty of added friends (or even people you never meet but simply approved their friend request), but from time flies you might have problem to keep track with actual friends & idle contacts. Since FB doesn't have a precise friend category definition to separate friends according to level of interest, thus it is advisable to isolate unnecessary people within your contact list. You may do the housekeeping say 3-4 months once. If you still prefer to have lots of followers from unknown places (since you don't even bother), you may consider to create another FB account for such purpose...
While you remove some contacts from the list, ever wonder who else remove you from theirs? Now you can do this in easy way by using a browser add on feature called Unfriend Finder. Try Google it for more detail. I'll advice to use it in Chrome (easiest deployment) or Firefox. Once done, you may see something like this:
Simply by clicking the Unfriends button listed, you can see who removed you from their list. Sounds a bit harsh, but I prefer better know it sooner than later.
Last but not least, a friendly reminder to all FB user try not to post discriminative & aggressive info/comments, lets make FB a better place?
