Hát, az ilyen és ehhez hasonló cikkekből gondoltam.
The ping response from an IP indicates the machine is up.
Unfortunately this can be used to quickly scan an IP-range for reachable hosts.
This can be used to find potential hackable machines. If your machine doesn't answer to pings, your chance to be seen is reduced. (That doesn't mean your machine is more secure, the machine is just not that easy to be seen from the internet. Nothing more.)
Butaság?