Funnily enough, I find the desire to continue interacting with someone who has clearly demonstrated they no longer wish to interact with you "repugnant". It is, in fact, one of the hallmarks of sealioning, a tactic of trolls that occasionally pop up in this forum to disrupt conversation and discomfort specific groups of people.
As mentioned a few posts up, I was the ignorer in the recent "conservation-by-proxy", and to say that it made me deeply uncomfortable is an understatement. Which, I would have to assume, was the point. The ability to have two-way ignore solves as much of this issue as is possible with the aid of technology, for which I am extremely grateful.
Of course, not even I, passionate proponent of two-way ignore that I am, think people should be entirely locked out of whole threads over it. If there are people I don't want posting in the threads I create, I've found that a "+" symbol serves well enough as a disincentive. And it seems like this functionality wasn't intended, I'll be as glad as anyone to see it fixed.
In the meantime, my advice to anyone who finds it onerous or upsetting to be placed on two-way ignore would be to modify your behavior such that people no longer feel the need to ignore you.