Depends on your definition, but mental/emotional abuse from camp personnel could easily be argued. Also, the Chinese girl goes to great lengths to get to the camp, including smuggling herself into the country, based on an advertisement that she picked up somewhere. When asked, she replies, "let's just say my parents wanted a boy".
No, but there are some similar offenses. The movie beings with a pan through a bullet hole in the head of an astronaut. At least one person is decapitated by an alien. In another scene, an alien stabs a fingers into someone's mouth and drags them offscreen; their face bulges strangely.
The kids share beds in one scene and there is a big hullabaloo about who will share with the girl, including talk about being a virgin, cock-blocking, etc. Earlier in the movie, a character misinterprets a request to "take it (his cell phone) out and put it in my box (literal)". The joke is emphasized.
Not EXACTLY... but multiple vehicles are destroyed by air assault or otherwise thrown around and destroyed. People are crushed/trapped. May be triggering.
An alien is lured into a pool, where it drowns; however, it later re-emerges because it can regenerate. (Not going to pretend this really makes sense, that's just what happened.)
A nuke is set off in the atmosphere, causing an EMP. It also makes the rest of the movie yellow, idk. No damage from the nuke aside from the EMP and the explosion, itself, is not emphasized.