I for one think this kind of mindset is ridiculous, only led by stereotypes of gamers and a general ignorance towards the video gaming community.
First of all, the question being posed is sexist, it only asks about "men over 30", which tells me there must be a stereotype about "girls not being able to game" or something ridiculous.
Their laughs disgust me, and I'm a bit scared at how many people their opinions influence per day.