harporoeder

There are explicit insider trading forms such as SEC forms 3, 4, and 5. Insiders are allowed to trade as long as it is declared to the government. The issue is with trading while having material non public information. Frequently trades are executed on an explicit schedule with rule 10b5-1 to act as a defense against accusations of trading on MNPI.

There is not generally an expectation of privacy in public. Things in public can be recorded without consent. Filming a car on a street and giving that video to the government is not the same as me giving private information to a third party, and then them giving it to the government such as Carpenter v United states covers.

Edit: Note that this is not an endorsement, rather stating that recent supreme court cases may not be applicable.