LOL...
i just checked and the hasbro version DOES have rounded off claws and teeth. its quite minor though as you cant even tell once hes on display. its like 1mm difference when you look at it from very close.

Wouldn't it be cool if the takara version really does draw blood?? just awesome!!!
unfortunately, cutting yourself with an metal twist-tie would have a much better chance of drawing blood than the takara grimlock can.