Question about usage of names and social convention

[Valery Belyanin]

I have heard a lot of times
ну что ты за человек! nu shto ty za chelovek! = negative connotation
ребёнок (ребятёнок), мороженого хочешь? = rebyenok, morozhenogo hochesh?
ljudu, poshli v kino! = люди, пошли в кино!
Valery Belyanin

> Well, everybody has kind of his/her own way of speech.. I'm Russian, and
I'd > find it unappropriate if someone address my friend "chelovek" in front
of > him. The only exception is "Pomogi cheloveku", but it's phrasal. > As
to "rebenok", it can be kind of a joke. But anyway, both are not polite at
all. > Rgds, Elena.