It is absolutely imperssible and possibly illegal based on invasion of privacy and possible …
In considering what you should do the question arises as to what you want …
If the people are identifiable--that is, from the facts, the first names, the descriptions, …
1) You can report him to the police for vandalism (egging the cars) and …
As the owner of the dog, you would be liable for negligence for the …
Are you a lawyer?