What if BLOOD GROUP is visible in facebook ?

Facebook has1.65 billion monthly active users. It has reached almost every countries.
Facebook has launched the LIVE Streaming facility.
Now, I desperately want LIVE GROUP VIDEO CHAT in facebook to come in near future.

But before that, Facebook should think on visibility of BLOOD GROUP of the users. There is no field in profile, overview or about section where a user can input his/her blood group. There are so many facebook groups which has been helping in blood donation with the help of status or post at the critical stage.So, if Blood group is visible to anyone, it would be very easy to ask and donate as there is already the contact no. visibility in Facebook.

How can this be done ?
First, Facebook should provide a section in profile details where user can input his/her blood group.
Second, putting a small icon in profile picture and if it is hovered or clicked, it shows four basic thing
1)Name
2) Address
3)Phone no. and
4) BLOOD GROUP of the user.

(But its not compulsory. If a user doesn't want to show his/her number or address or blood group its fine. They can hide them.)

For example Like this :

My profile with a new property 

I think this will be helpful to everyone. Hope Facebook will understand the importance of this feature.

Beside this I desperately want GROUP VIDEO CHAT though it is available in some apps and skype.

Thanks.

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