This can be very dangerous - they may like it so much they end up spending $15-20k+ on a pilot license.
Only caveat with this is that it could potentially be a hindrance for someone getting life insurance.
I recently applied to a couple companies and they all asked me if I had flown an airplane in the last 12 months.
I would not have known better to even consider this. Useful to know!
Eh, if you're just doing lessons then I wouldn't count that. The instructor is the one piloting the plane. Even if you take control, they're the one responsible for the aircraft as the instructor. I would only answer yes to that question if you solo.
That doesn't mean they'll reject your application. I doubt they would reject based on a single lesson.