Unfortunately, we have recently noticed many negative reviews of BetterJTV, labeling it as "spyware" or "malware" which collects information from your computer. These reviews are completely false, and may have (possibly) been planted by the Justin.TV staff in an effort to stop the growth of our plugin (although there is no proof of this).
We feel so confident of our extension, that we encourage you to decompile, reverse-engineer, or view the source code at any time. You can find the full engine code of BetterJTV here. The extension hook source code can be found by downloading the extension binary and de-compressing it with one of the many tools available online.