Full disclosure: I stopped reading HPMoR in the middle of Chapter 53. When I was researching my comment, I looked at the immediate context of the initial definition of "heroic responsibility" and reviewed Harry's rationality test of McGonagall in Chapter 6.
I would have given Harry a three-step plan: inform McGonagall, monitor situation, escalate if not resolved. Based on McGonagall's characterization in the part of the story I read, barring some drastic idiot-balling since I quit, she's willing to take Harry seriously enough to act based on the information he provides; unless the bullies are somehow so devious as to be capable of evading both Harry and McGonagall's surveillance - and note that, with McGonagall taking point, they wouldn't know that they need to hide from Harry - this plan would have a reasonable chance of working with much less effort from Harry (and much less probability of misfiring) than any finger-snapping shenanigans. Not to mention that, if Harry read the situation wrong, this would give him a chance to be set straight. Not to mention that, if McGonagall makes a serious effort to crack down on bullying, the effect is likely to persist for far longer than Harry's term.
On the subject of psychology: really, what made me so emphatic in my denouncing "heroic responsibility" was [edit: my awareness of] the large percentage of adults (~10-18%) subject to anxiety disorders of one kind or another - including me. One of the most difficult problems for such people is how to restrain their instinct to blame themselves - how to avoid blaming themselves for events out of their control. When Harry says, "whatever happens, no matter what, it’s always your fault" to such persons, he is saying, "blame yourself for everything" ... and that makes his suggestion completely useless to guide their behavior.
Your mention of anxiety (disorders) reminds me of Yvain's general point that lots of advice is really terrible for at least some people.
As I read HPMoR (and I've read all of it), a lot of the reason why Harry specifically distrusts the relevant authority figures is that they are routinely surprised by the various horrible events that happen and seem unwilling to accept responsibility for anything they don't already expect. McGonagall definitely improves on this point in the story tho.
In the story, the advice Harry gives Hermione seems appropriate. Your exa...
[Originally posted to my personal blog, reposted here with edits.]
Introduction
Something Impossible
The Well-Functioning Gear
Recursive Heroic Responsibility
Heroic responsibility for average humans under average conditions
I can predict at least one thing that people will say in the comments, because I've heard it hundreds of times–that Swimmer963 is a clear example of someone who should leave nursing, take the meta-level responsibility, and do something higher impact for the usual. Because she's smart. Because she's rational. Whatever.
Fine. This post isn't about me. Whether I like it or not, the concept of heroic responsibility is now a part of my value system, and I probably am going to leave nursing.
But what about the other nurses on my unit, the ones who are competent and motivated and curious and really care? Would familiarity with the concept of heroic responsibility help or hinder them in their work? Honestly, I predict that they would feel alienated, that they would assume I held a low opinion of them (which I don't, and I really don't want them to think that I do), and that they would flinch away and go back to the things that they were doing anyway, the role where they were comfortable–or that, if they did accept it, it would cause them to burn out. So as a consequentialist, I'm not going to tell them.
And yeah, that bothers me. Because I'm not a special snowflake. Because I want to live in a world where rationality helps everyone. Because I feel like the reason they would react that was isn't because of anything about them as people, or because heroic responsibility is a bad thing, but because I'm not able to communicate to them what I mean. Maybe stupid reasons. Still bothers me.