Poorly Worded Warning about Installing Add-ons

"Only install add-ons from authors you trust" - this has got to be one of the most useless warnings around. Who can we trust? Should we only install an add-on if we know the author personally? I guess Songbird puts this warning there to try and disclaim liability. But wouldn't it be much more useful if there were some way to verify add-ons and give users some idea about which ones can be trusted? Or at least just warn them that any add-on they download has not been checked for potential threats. The current warning is just silly because anyone who cares about security would have to refuse to install any add-on. I certainly don't know who any of these authors are and I'm sure that 99% of Songbird users don't either.