Authorities will enforce an abortion ban in the same manner they enforce bans on underage drinking, illegal drug use, drunk driving, etc. There are quite a few people who will drive home from the bar tonight while intoxicated. It is Friday night after all. Not all of them will be pulled over by the police. But some will, and they'll go to jail, and there isn't anything unconstitutional about it.
And let me assure you that there are millions of little teeny boppers out there getting drunk and getting stoned, listening to some really bad music cranked up loud. Not all of the little parties will be raided by the police tonight. But some will, and the little teeny boppers at those little parties will go to jail. Once again, there isn't anything unconstitutional about it.
This is not selective enforcement. This is accepting the things you can't change, taking action to change the things you can, and having the wisdom to know the difference.
But the examples you give are all victimless crimes, unless the drunk behind the wheel doesn't manage to make it home safely -- but even in that case he'd be charged with vehicular homicide in addition to drunk driving.
Looking at the invective here, it strikes me that the goal is to have abortion treated exactly like murder (referring to doctors as serial killers, etc), since it snuffs out an innocent human life. And there's no statute of limitations for murder.
What you're proposing is not a "serious" enforcement of an abortion ban, as I put it in my posts. It's lackadasical enforcement, and that's not going to be good enough for some of the more vocal participants in this debate.