It seems natural to use multiple geotags in post that describes many places (f.e. in https://steemit.com/travel/@miosha/land-of-extinct-volcanoes-part-7-16-milek-quarry-cf4561ff483f8est I wanted to pin start of official trail around the mountain as well as shortcut leading directly to the quarry).
I don't see how it prevents abuse either, if one could just make multiple posts composed of geotag + link to main post, but ok.