Exactly.
It's the same with anything illegal.
If someone is going to do - regardless of advice or your personal belief, the best thing you can do is advise them how to do it safely.
I read the post and was like he|| telling someone to carry ou an abortion - oh my that's so unethical".
Then I read the post, and understood why the poster advised them in the best manner in which to use the drugs they already had.
Her advise could actually have saved the girls life.
Given that if there are any complications post abortively, the girl can go to a doctor and claim she miscarried but it doesn't appear to have completely passed, in which case they are obliged to treat her and no-one need know what really happened.
This is what would happen in the states and/or usa *if* abortion was illegalised.