Let me add that, in principle, no one is opposed to making Python more fault-tolerant, certainly if there are demonstrable cases where the behavior can be exploited to deny services to others.  Cases like this, where it would seem that exploiters could only deny service to themselves, are much less interesting.  If someone were to submit a patch with tests and with benchmarking to show that the fix has minimal performance implications, a core developer might be inclined to review it.  But that seems like a lot of work for little gain when there are far more important problems that need attention.  Hence "consenting adults".