I cut the rind off just in case they are sprayed while growing and some
residue of chemical still on rind. Same as with apples anymore I always
peel them before eating.
While I've never thought of pesticides, I always feed cantaloupe with the rind on. Young and old, however sometimes I only give the very young (under 30 day old) hatchlings the inner, softer part of the cantaloupe so its easier for them to eat.