Tagging tip: When people make ways of barrier=* tell them that each node crossing a road needs to have those tags

[thibaultmol]

In situations like this where a fence crosses multiple roads, it should maybe note somewhere in the UI that each node that crosses a road also needs to have that barrier tag for it to actually affect it (routing and such)

Because people might just draw a fence over like that and think that it's mapped 'correctly'

[quincylvania]

#6349 and #7418 are related, and maybe cover this already.