The problem with that line of blame is that no form of contraception is 100% effective, and mistakes can happen. I do however, fully respect your decision to not want to be a Father, i wouldn't want to be a parent either.
I was fairly impressed by mylk, they let me in with ID that was
a. expired
b. cracked
c. not remotely passable for me
Stonewall and Arthouse get similar kudos etc