First and fore most thats is a big assumtion to make.
I call it giving someone the benefit of the doubt. Assuming he was trying to pass them off as his own work or that he intended them to be part of the final product is also an assumption. I just chose to assume the best until given reason to believe otherwise.
Second off passing off some cool screenies of chars he didnt make doesnt count as work in my book.
There appears to be a ( partly ) functional battle system in there too. Are you suggesting he downloaded that from polycount too?
third i don't care if he finishes his project or not, im busy with my own....
Well it's good that you could afford some of your time to stop in and criticise a project you were unable to work on anyway.
Don't get me wrong. I'm the first to criticise team requests that are essentially "hello, i've just bought blitz, i don't know anything about it but I'd like to make a game just like Halo/Morrowind/GTA3/Elite. I'll need people to do programming, modelling, textures, sound, music and networking.. I'll just be in charge and tell you all what to do." I can understand why people tell them to go away and come back when they've got something to demonstrate ability/commitment/seriousness.
I just think it's a bit mean when they do that and they still get criticised. It's hard to judge from the screenshots, but speaking as someone who would like to write an RPG one day, it looks like quite a lot of work has been done to me.