I'd tried to search it, but didn't find it, can you provide me a link for this tread? please
There were many threads about this, using the search function with just "ramp" gets lots of results.
I'm curious how solve this issue.
It's not an "issue", it was made intentionally, to get rid of the default ground vehicles that would interfere with our own. It's not really unique, other developers flags everything as military to obtain the same result.
Of course, under FS9 this is not really an issue, since there are not default ground vehicles to begin with, but since we port the scenery *from* FSX, the assignment is still there as a result of this.