Sure, it's OK.
It's completely OK.
NO YOU'LL BE THROWN IN JAIL FOR CRYING.
Of course I kid, (maybe) lol, I cry when movies get emotional or when I put myself/close ones in the positions of the characters in the movies I watch. It's totally normal
It is much better than crying at the beginning if a movie.
Hmm .. Well that is a good question. I would assume it would be considered appropriate to cry where ever there happens to be a scene that makes you WANT to cry .. If the scene is at the beginning, I really can't see someone waiting until the end to let 'er rip. That's not even logical.
Yeah it's okay. You have feelings.