[jyl]

That is a sense of entitlement by that particular kid. Where did it come from? Ask his parents.

That said, Internet today is viewed by kids and many adults as a critical utility much like electricity or running water.

I say, leave the coax unscrewed until the house and yard looks like it should. That is, IF the house is yours or entrusted to you to manage, so that it is your business. If you're just butting in, then I'd say butt out and let your sister deal with what she created.