A question for the administrators

[Lew]

I haven't posted here in a long time and so I just started to look at a couple of things and one item struck my curiosity.
If a member goes to the section that says Edit My Details, there is a place that shows a members date of birth.
Under that space there is a note that says to "contact the administrators if your date of birth changes."

My question is: does that happen very often !!!!!!!