High Risk of Penalty Due to Providing Fake Traffic.
Jingling was a frequently used method for artificial visitor attraction in its early days, unnoticed by Google. Even if no one visited the site, this program would show high site traffic. However, since this program provides fake traffic, it has a high probability of causing a suspended penalty. The program, used to increase Alexa ranking, also brings several disadvantages.
.htaccess IP Range is Sufficient to Block Artificial Traffic.
Jingling, which poses a great risk for Google AdSense service, mostly shows artificial visitors with IP addresses coming from China. To block artificial traffic intentionally sent by others, blocking specific IP ranges with .htaccess might be sufficient to prevent Jingling-sourced traffic. Similarly, it is also possible to redirect visitors elsewhere for a period using a 301 redirect.
