Revealing mistake: The 3-light tree floor lamp in Soren's house (upstairs where Lucas and Thor encountered Hannah and Lily) has "fake" lights. Instead of seeing light from actual bulbs, each is simply a solid white circular shape. (01:16:30)
Revealing mistake: In music class, the position of Max behind Lucas would not enable Max to see Lucas' face to know he was crying or ask "what's wrong?" In this part of the scene, Max appears to be green-screened and his eyes are focused too far left of the back of Lucas' head (not just face); he would be lucky to be able to see a part of Lucas' left ear. (00:09:58 - 00:10:32)
Revealing mistake: Benji was talking to Hannah in the back yard near the swimming pool and many feet away from Hannah's house. Eventually, a large white beam or horizontal area appears behind Benji's head. Although this doesn't make sense, it apparently is meant to be the overhang of the house. Benji was too far away from the house to be "under the overhang" plus the overhang is not nearly that wide. (00:19:40)
Revealing mistake: A stunt double was used for Lucas flying off his bike and into the side of a delivery truck. The legs are obviously thinner; Lucas isn't that "thin." Even though movie goers could assume that a stunt double would be used in this situation, the director / producers apparently did not even try to make the stunt double pass as Lucas - and all they needed to do was make the stunt double wear bigger pants (Lucas' size) and add padding. (00:36:58)
Revealing mistake: The use of a green screen (or other color) during most of the cafeteria scene is obvious if you watch the people in the background instead of the main characters and is flawed in a few ways (e.g, varying angles, greater distance, continuity of a person, etc). For example there is a man wearing a blue shirt/tan pants and carrying a briefcase walking down the aisle toward the Good Boys' table. When the man is walking along the wall that is behind the Good Boys, he is further ahead than he is when he is picked up again. Also, this man shows up in front of Max when Max is walking to Soren's table. The man also appears walking along the back wall with a woman. Watching the wall behind Thor and Lucas, it is sometimes at an angle and other times looks more distant. Some of the people would essentially be walking "out of the wall" in order to appear where they do (e.g, the boy with a backpack).
Revealing mistake: The paddle used by Thor in the frat house is a prop. When it is slammed over a frat guy's back, it breaks into two halves with one half showing a connector peg. (00:51:10)
Answer: Max's dad probably over-reacted out of anger/rage over the drone and destroyed room and might have made changes after he cooled off. Plus, it was meant to be humorous. A "month in the hole" was immediately imposed; no more birthdays, holidays, summer, etc. would refer to after the month in the hole. Max's dad did not say he couldn't attend school-related events, such as the "Rock of Ages" show. Parents are supposed to give their kids unconditional love. A father can continue to love his son while disliking his behavior. Max's dad may have been unduly harsh (again, out of anger), but he still loves Max - which shouldn't be depressing. I don't think Max's dad said he was grounded for life, just grounded. However, Lucas told his parents that Max was grounded for life - an exaggeration.
KeyZOid
So, even after being grounded for a month, he can't celebrate his birthday or summer vacation?
Not necessarily. Max's dad said those things in the heat of the moment. Although it is possible that Max's dad meant what he said (at least at the time), it isn't probable. The severity of the punishment given to Max was a reflection of how angry Mr. Newman was. A proud and loving father who tells his son "I will always love you..." is more likely to forgive Max so that they can return to their good father/son relationship.