I ask people how old they are, just because I am older and if they seem older, I like to add them as friends if they are in my age group. I would be upset if someone reported me for asking their age. I have had people tell me things and I tell them they shouldnt be giving personal info out. If you are asked and dont want to tell, than dont. It is better to be careful, and if someone gets mad about it it is their problem, dont worry about it.