From what I'm read it stars active duty SEALs. Not just cameos. However, they will not be credited and their names have not been released.
Some of you, are ignorant of, or forgetting, your history.
The SEALS first mission was a publicity tour across the country to tell everyone how bad @$$ed they were.
The head of the navy was tired of reading about the Army Rangers and commanded that some 'Navy Rangers' be created.
The military has a longstanding tradition of working with Hollyweard. How else do you think those movies with battleships came into being before CGI?
This gains the military 2 things:
Attention, it is recognized that the way to get recruits is to portray the life in a positive way to teen boys.
Control, the terms of the contracts to use military equipment, bases, and personnel dictate that the picture MUST portray the military in a positive light.
SEALS aren't DELTA. They (With rare exceptions) do not function as spies, or do anything where this would negatively impact their jobs. (If it were it would be easy to select some guys who were getting out, higher rank etc.)
You CAN be in a movie, or the news so long as:
1. You receive permission ahead of time.
2. It does not reflect negatively upon the military.
Lastly:
How do you know there is a pilot at the party?
He will tell you.
How do you know a SEAL is at the party?
He won't STOP telling you!