So we discussed this and technically it’s probably not feasible. We suggest saving search URLs to avoid seeing observations of organisms you don’t want to see. See more about search URLs here: https://forum.inaturalist.org/t/how-to-use-inaturalists-search-urls-wiki/63 So I’m going to close this thread.
A possible future solution would be to use crowdsourcing/machine learning to create more filters when searching.