If a tag is ambiguos and it's not possible to correct that in the excerpt, it should be burninated.

To fit the uses:

1. Should be retagged to [tag:home-folder] or to another tag that already fits that purpose.

2. I don't see a point in this, the location context is almost always irrelevant to the actual problem.

3. Should be retagged to [tag:home-networking].