[Tagging] Hiking "guideposts" painted on rocks, trees etc.

[Michal Fabík]

Hi,
in some parts of the world, it's common practice to paint guidepost 
information (destinations, distances etc.) on rock faces, trees, walls 
and similar existing surfaces, rather than use purpose-made plates 
attached to a pole. (Example: 
https://osm.fit.vutbr.cz/fody/files/21255.jpg)

Do you think that these warrant their own tagging style? Or is it 
acceptable to use information=guidepost, maybe with an additional tag 
(although I can't think of one off the top of my head)?

I should probably stress that this is an established practice with the 
local trail maintainers and the "guideposts" have a uniform appearance. 
I'm not talking about scrawlings by random passers-by.

Cheers,

-- 
Michal Fabík