Yeah, erm.
You should only ever eat fruit skins if the fruit is organic and the skin is clean.
At this point I think its safe to say there are hundreds of scientific studies out there telling you why. This is one example[1].
I quote from their abstract:
Notably, the distribution of pesticides in the apple peel and pulp layers is visualized through Raman imaging, confirming that the pesticides penetrate the peel layer into the pulp layer (∼30 μm depth). Thus, the risk of pesticide ingestion from fruits cannot be avoided by simple washing other than peeling.