Hasell,
if any Wannabe made himself known to me, he or she would be very welcome to visit the flight deck. As you'll see from my profile, I'm not a commander with VS yet, so there may be a veto from the LHS, but it's unlikely. As I've said elsewhere, there are legitimate reasons why it might not be possible - but if you don't ask, you don't get!
As a generalisation, PPLs (and those on the way) who show a polite interest (and don't try and take over!) will usually get either a t/o or landing jump seat in my aeroplane.