Baby sweetcorn is a Green food. Green foods are safe to eat as a regular part of a diet.
Guideline related quotes related to Non-Starchy and Green throughout Geoff Bond's publications.
Eat at least 2 3/4 lbs of mixed salad and vegetables per day, consisting of "Green-Green” and “Green” foods. Of these, at least 3/4 lb should be mixed salad. Also include at least 5 cups of “Green-Green” leafy vegetables or 2 1/2 cups of other vegetables per week. ~Paleo in a Nutshell p.102
Specific references to Baby sweetcorn throughout Geoff Bond's publications.
Note that we include "baby" sweet corn as a good salad vegetable. Unlike its mature form, the grains in baby corn have not yet formed and it is neither starchy nor glycemic. ~Paleo in a Nutshell p.62