Good question.
Harder than most people imagine and there's actually a message here for the Catholic hierarchy about the futility of some of the measures which they've supposedly enacted.
There has been a general assumption that after the enactment of the "Dallas Charter" of 2002 that everything was now OK. "Don't worry folks....we've instituted zero tolerance.....we'll clean up this mess!" However, the assumption that the simple enactment of some conference resolution by the bishops would solve the problem, always seemed naive to me.
Why?
Because long ago, the Church already had in place clear rules and regulations about the ordination of homosexual clergy and those rules were ignored. Why should we expect that one more set of rules would solve the issue?
As recent events in Philly have shown, they won't.
This problem won't be solved until the Church returns to actually following its own doctrine and the seminaries are straightened out. The current crop of homos must be flushed from the system and die off. Resolutions and declarations issued by the USCCB are just so much useless paper and these events in Philly may help them to see that.
MM, as you well know, that is easier said than done.
I have predicted in the past that their will be an open schism in the American Catholic church one of these days. The rot is so entrenched it may be impossible to root out with out causing one.
I have seen this play out in many other churches, including the LCMS. Once you get enough people in power of that leaning, they will not willingly step aside.