Fortunately you don't actually decide that, you are not a confessor, you are not a priest and you are not a man either, so it is not your decision or your place to suggest who can and can't receive communion... You don't know who is using ABC or NFP to prevent pregnancy and both are used to prevent pregnancy, so I can't see why it is any better or worse actually....You don't know if the women in your church are using NFP or ABC, unless you have lots of large families I would think they are using something other then NFP, I would hate to know what you think of families with two children, when they come to church... but I'll bet their parents are welcome .....
As long as Cherie Booth is not ex-communicated and she admitted to using contraception in her book, she has had audiences with The Pope and her husband can be come a Catholic after starting a war...ABC users are safe...They have openly attack Pope Benedict XVI and they are still not ex-communicated...There would be very little church left if the church seriously ex-communicated people for it only single men and elderly, conservative women will be left..
Nobody goes to Communion free from sin, nobody....for some it is getting the snip or using condoms, for others it is judging others or not putting others before themselves...
And the reasons for preventing pregnancy maybe because of money worries, which went people are losing the their homes and health insurance.. some because they suffer very bad Post-Natal Depression or clinical depression or had a bad pregnancy and fear another or they have a child that has problems such as autism, leaving them exhausted and another child would be too much and maybe kill their marriage....calling them "weak and frail" is robbing them of love and understanding...