oh my god depending on how close i am to them id probs avoid them [distant person] or seriously deactivate [close person]. its not that i have anything to hide. it's just that the point of me making this account and being active on it is to seriously escape my real life for awhile. i like alternating between the real and online worlds. being here and 'interacting' with people from different cultures is relaxing and somewhat educational for me, so to have someone 'permeate' through that just creates this weird disturbance in.. the forces haha :P i think that made some sense.
Depends if you have mentioned something bad about them or betrayed them in someway, then yes it would be a horrible way for them to find out. But if your squeaky clean then no problem all the family is welcomed.