It's not really explained what happens when Bloons get trough but I doubt some balloons can be that dangerous.

Also works as a way to remove programs you are not really using anymore but had installed before. And although more annoying but I guess resetting configuration files to default settings every now and then is not too bad either.

I have added some nearby forest paths to OSM and added some bicycle paths alongside roads which were already mapped, using OSM mostly for outside of road network since other maps do not show forest paths and the like at all while OSM has decent coverage

Wiki has descriptions for the surface types, https://wiki.openstreetmap.org/wiki/Key:surface gravel seems to be general term that includes compacted gravel, I had to look up difference between dirt, ground and unpaved without text descriptions from the wiki that would have been impossible.