I totally understand your frustration.
All I can say is the common denominator and bottom line of all of what you mentioned is simply "disclosure". If (or you could say "since") at the very least, all of the side-effects, etc. and/or even mechanisms of action have been FULLY disclosed (no matter what the MOAs actually are, such as the abortion pill), these drugs will be allowed to stay on the market.
The problem with Tysabri was just that. It is highly suspected that any possible problems were NOT fully disclosed up front. Had Biogen and/or the FDA simply just fully and honesty disclosed the possible risks and/or safety concerns (as I tried to alert the FDA to do), patients would have been making a more fully informed decision about taking Tysabri (which is the law in medicine - i.e. "informed consent"), and Tysabri would never have had to be taken off the market at all. It doesn't matter how "horrible" the possibilities or possible consequences of taking any drug might be, it all just boils down to disclosing those possiblities up front BEFORE putting it on the market, and putting those precautions, warnings and contraindications in writing and made available to physicians and patients alike BEFORE taking or distributing the drug.
That's what the whole Tysabri thing rests on, basically (aside from the possible SEC charges, but that's a different aspect altogether).
When the label came out, I cringed. All they would have had to do was to disclose more and put better warnings in the label and all this most likely would have been avoided.
That was all that happened with Merck regarding Vioxx. They simply didn't do proper "disclosure".
It's a shame, I agree.