I get that opinion because my area is vulnerable to get lightning strike. That condition had been happened to one of internet cafe near my area when heavy rain/downpour happens. The lightning strike caused damage to several computers and internet network at that internet cafe.
But if someone wants to build an internet cafe near my area, he/she can build internet cafe with lightning rod but it doesn't guarantee condition computers and network during lightning strike happens. So beside using the lightning rod, the internet cafe needs to stop their network with plug out your network from server or modem during heavy rain/downpour was happening. With that the electricity from lightning not flowing to server or computer cable.
