How do we know it was chewing gum? Could have been supari, gutkha, tambaakoo, suanf, laung, ilaichi, jeera, mango bite........ The possibilities are endless...!!
I think we should at first firmly establish what he was chewing. That is important to advise him properly. If it was gutkha/tambaakoo, for example, then our recommendation should be to not chew it anytime. Maybe we can tell his mom as well, ki tera chhora gutka chabaawe tha...
Then we should also keep in mind the circumstances. Maybe he has bad breath or had just taken a swig of whisky and wanted to chew something before greeting his royal highness. Or maybe he wanted to throw it but couldn't find a dustbin and couldn't bear to spoil the ultra-clean stadium and before he knew, the camera was on him. Now, it was better to keep it in the mouth than to spit it on camera when the whole world was watching the live telecast. In such a scenario, we should actually praise him for thinking on his feet!!
Given the importance of this discussion, I think we must be very thorough in our thinking!