Again I stop putting money in it, I just gave my 10 cents & with this kind of feedback I am broke again…
There’s a balance that needs to be struck here. Our primary means of dealing with vandalism is that another mapper sees there’s a problem and reverts it (or escalates it if unable). Reducing vandalism to smaller areas actually might just reduce our ability to spot it.
That said, I wonder if it is possible to make it so that “suspicious enough” changesets don’t cause tiles to be considered dirty and instead get flagged for attention. Other than the than the “small matter of programming” the big problem is who gets the flag (loads of human attention needed). Could we avoid the need for the flagging part?
For Example:
- Are there enough people monitoring e.g. osmcha feeds that we don’t need any “trusted user only” views to be constructed. These can be a bit slow to update, but wouldn’t require anything new.
- would there be enough “local edits” getting criss-crossed with the vandalism that the ‘one off’ tile updates would give good enough visibility without rendering the whole thing?
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I’ve read it, but I don’t actually understand what you’re suggesting 
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Ok what I suggest:
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keys which follows the law/rules of the specific mapped country if there are differences between the country law/rules and the OSM rules. As example: NL: Wikipedia leads to a Dutch Wikipedia page. In the same logic NL: cycleway follows then the mainstream used in the Netherlands NOT the mainstream rules of OSM because they differ from each other, same as NL: busway and so on… In this case even if a person in India is changing keys in the Netherlands then they must follow suite according Dutch law & is easily checked by Dutch mappers on flaws because a Dutch person follows Dutch mapping according their local law (also aplicable on traffic signs, right of way rules and so on) This can be made solid in the software…
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Last defense line against map molistating editors have a 7th OSM server as backup synching with the 6 other servers being operational if the mutations being made on these 6 servers are not equal the 7th server does not allow the mutations being effectively put in place as mutation on the OSM-database…
As ever, I don’t think we have a shortage of ideas to combat the problem, what we have is a shortage of people actually implementing any of them.
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and while ideas are thrown back and forth here, TomH is quietly and effectively working on getting more resilience into the OSMF rendering servers.
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Ow problem solved then, no worries back to our cup of tea then 
Someone asked me to eleborate what I meant so I did…
More resilience is not the same as solved, it just lessens the impact on a technical scale.
Again: this won’t be solved on a technical level alone (or only while also destroying the spirit of OSM as an open project. E.g.: do not allow any edits anymore=problem solved ), so you would need to tackle the problem on another level.
I often record a video of something I want to edit later, at home. Then, when I’m at my laptop, I do the actual map changes.
Limiting edits to where I am currently are will limit all my edits to the country where I live.
I reported some vandalism a while back on the island of Crete,Greece. I saw your name in the vandalism but had no idea you were a moderator. Sorry this has happened to you. I unknowingly thought that that this was some disgruntled person on Crete and I was asking around. I now understand I was way off the mark!
Here we deal with things at “ a local level “ but obviously not the case . It’s a pity this happens