Yes, I have a program that pings IPs a million times per millisecond. Not only will this slow down the target's computer, but it will also automatically alert the target's ISP and flag the target for suspicious activity. This is really all very simple. First, we must consider the very definition of the word "ping". The dictionary states that a "ping" is a "hard sound". Now imagine a bajillion of these digital "hard sounds" going through the Internet and into your computer, while your ISP monitors every activity. You won't be able to actually hear it, but your computer and ISP sure will. Your ISP will tell you that the "sounds" are too "hard" and may forcibly cut off your connection. If the computer "listens" to these "hard sounds" long enough, it may get permanently damaged.