whats the plot

#!/bin/sh
APP_NAME="Etisalat_3.5G_USB_Modem"
APP_PATH="/Applications/Mobile Partner.app"

sudo chmod -R a+rwx "$APP_PATH"

chmod -R a+rw "/usr/local/"

the above code snippet is from the first few lines of one of the etisalat 3g usb modem’s postinstall script on osx – seriously, why chmod -R a+rw "/usr/local/"? no one uses /usr/local except etisalat?

the modem is a huawei e1550 hsdpa usb stick.