Choose friends wisely. ;) You control your own privacy settings and you can delete posts, but you have no way of knowing what your friends will post to your account. Photos, language, violent games, etc... Parents should be aware of what could find its way onto the site from friends and relatives. Also, some individual programs and add-ons contain nothing but spam and spyware. Use caution.
I almost lost my mom to this site. One guy she met as a 'friend' had ultimately tried his best to win her over by sweet-talking into leaving my dad. Oh the revenge i would love to inflict on this guy.. he even had a family of his own (a wife and two kids)!! My mom had a hard time getting over this guy too, and she had only known him for about a couple months. Not 100% sure why she would ever think of leaving my dad as he does everything and then some for her. I guess this guy filled a void that my mom couldn't have with the relationship she was already in.
There ARE people out on this site that need their balls cut off and for that reason i lost all the reason i could possibly give this site. A very moody family we were for about a good week after my dad found an explicit photo of the man on the computer. There is merit to this site if it can be used appropriately. Husbands, keep an eye on your woman!