If the issue here is Mining, perhaps we need a better way to show the new players the Resource World and what it does, and I do believe in Build first wg later in this case, not like some guy is gonna mine just next to you and the area you build and grieff it, that can be dealt with.

Regarding the "wg'd places all around the undergroundworld", a person should not get only a wg below 30, but also above it, monitoring the wgs would be a pain I believe, so a fee might be a good idea to make players think whether they really need it, however, as I mentioned, at places like deep oceans, there's not much ground above, and perhaps the fee there should be denied.