To be honest, at the time, my older cousins said most of this stuff too. Specially "this is cheesy" and "why they do introduce theirselves with silly poses?" . They were like 14 or something.
I remember the time MMPR came (we had Liveman and Jiban before, in Spain) I was like 9 and into anime so I didnt have to excuse myself for watching it, but other kids had it as a guilty pleasure. Bullies would laugh at you for watching such a kiddie show.