I don't pinch anything back but peppers and tomatoes,If plants are too young and I see any buds then I pinch them off.

If the plants are planted in the garden (not still in 6 packs or small pot) then don't worry about it. If the plant can't support the fruit it will either drop the blossom or abort the fruit. It is quite common IME for squash to either have only 1 sex of blooms early on (usually male) or to drop its first few female blooms all on its own.

Dave