If you are obstructing any job site, law enforcement will move you on in the first instance, then if you refuse to go they will arrest you, releasing you later in the day with a caution.
![police :police:](/Smileys/default/police.gif)
If on the other hand you cause any damage, then it will be a matter for the courts.
![Mind Blown :poof:](/Smileys/default/Mind_Blown.gif)
Of course I can only say what would happen here in the UK, in your jurisdiction things might be handled differently.
![police :police:](/Smileys/default/police.gif)