We do get emails from people who ask if it’s possible block spiders, snakes, parasites, dead animals, etc when using iNat, so there’s definitely a use case for this. I can’t say if it’s technically feasible, but if it were, I think it would be worth exploring.
I have done years of outreach involving snakes and spiders (animals I’ve always loved and championed) and it was pretty great to see people who were initially afraid of them learn to at least fear them less (and sometimes learn to love them!), but they probably didn’t have a full-blown phobia. I used to treat these situations a bit cavalierly, but have recently come to terms that an anxiety which has affected me for most of my life is really a phobia. I now have a better appreciation of how debilitating they can be, and that everyone has their own tolerance level and pace of exposure, as @corvidaeus said.
@mira_l_b started a great convo about fear of spiders and iNat here, it’s definitely worth a read.