[mrex]

>Its very much a US thing

Are you sure? I've done a little bit of spot checking on Google Maps, and I find that national flags are clearly visible outside public schools in:

Canada Mexico Poland South Africa

...all have flags with flagpoles outside public elementary schools.

[GentWhoCodes]

Flags yes, but none of those do flag worship like the USA does.

[dangerface]

Yes I am sure. [0] The first Canadian school I looked at on google maps doesn't even have a flag pole never mind the flag. If this school was in America I would expect it to be burnt out by the end of the day for such a disgusting display.

[0] https://www.google.co.uk/maps/@43.8835313,-79.4254555,3a,75y...

[feet]

So if we add the US that's 5/300+

Sorry, I don't know how many countries exist but that's a pretty tiny percentage