Hi again Antandrus.  I agree with your point two, of course - I mean that sincerely.  My problem is that I've been editing anonymously for a while, I really don't know how long, and time was that I didn't have any problems with people randomly and arbitrarily undoing my work.  At some point this began to happen.  It is incredibly offensive.  In fact, to me, it is much more offensive than if someone called me a cunt.  The first time, I assumed it was an isolated incident, but then it happened again... and again... and again.  At least 10 times, and perhaps 20 times or more, my edits have been reverted, often with no explanation, and sometimes with accusations of vandalism.  It's been many months since the first time.  And whether you take a polite tone, or you just mouth off at everyone, the end result is exactly the same.  I have seen probably three or maybe four editors, yourself included, who have taken what I thought was the obvious view that you shouldn't arbitrarily revert IP edits, and I have seen at least ten times as many editors who revert arbitrarily, and plenty who invent post-hoc justifications for their actions.
These arbitrary reverts are a real slap in the face.  I get more satisfaction out of responding viciously than I would out of responding politely, and the end result is exactly the same.  It's very, very depressing to see how reasonable, sensible people like yourself became the minority.  Believe me, if you were the majority, I would not be viciously slagging off anyone.
My IP will change at some point, I don't force it to but it does.  I have no respect for the blocks that result from me being accused of vandalism, so I ignore them.  And I keep on trying to improve articles, and eventually, the same will happen.  So be it.  190.45.54.212