You assume you won’t hurt anyone, but there’s still the chance to. What’s to say that the person riding the mower may veer into oncoming traffic causing an accident and harming people that way. Just because you don’t initially see something wrong with it doesn’t make it ok.

Nor should they because that tips off to the foreign states which of their actors has been compromised. By keeping it a secret all of them will be scrambling.

Press X to doubt.

They’ll not clean up their mess, leave, and let Nigeria (thanks Skua for the clarification ) deal with the consequences of Shell’s actions. Just like Shell planned from the beginning.