Just kidding, obviously. That's how countries that aren't Israel get to respond to violent border violations:

Egypt's foreign minister said that no further violations of its borders would be tolerated in the wake of a 12-day breach on its frontier with Gaza and said anyone daring to cross would have their legs broken, the state news agency reported. The uncharacteristically assertive remarks by Ahmed Aboul Gheit came during a late night interview on state television, in which he criticized both Israel and Hamas for creating the unstable situation on Egypt's border. "Anyone who violates Egypt's borders will get his legs broken," Aboul Gheit was quoted as saying. He added that Egypt only allowed the Palestinians to cross the border after Hamas blew up the wall because of fears over the humanitarian situation resulting from Israel's blockade of the Gaza Strip.

That last part, of course, isn't technically "true." Egypt has a habit of finding all kinds of convenient excuses when they want to let Hamas smuggle things in and out of Gaza. Or they just happen to look the other way for years and years - or as an international lawyer might call it, they just happen to violate decades of treaty obligations.

References:
* Egyptian FM: We'll break infiltrators' legs [JPost]
* Egypt Opens Border Crossing, Allows Hamas To Smuggle In Money [MR]
* Camp David, Other Agreements With Egypt Working Out Great - Cairo "Working Against Israel For Years" [MR]

Previously:
* It's Official: Egypt Embracing Hamas Through Contacts, Prisoner Releases
* Persecution Of Baha'is In Egypt and Iran Fails To Gain International Attention [Video]
* Turns Out, Egypt Not Pro Israeli Security