I've posted on the subject of through-glass antennas several times but the inaccurate and misleading information about them persists. Briefly stated, the glass is a capacitor, the RF signal is an alternating current (AC), and the basics of electronics teaches that AC passes through a capacitor but the capacitor blocks DC. The fact is that there is nothing wrong with a through-glass antenna if it's installed and tuned properly, and the blanket statement that such installations are "really bad to begin with" is simply not true. Now, if one insists on installing such an antenna on dark-tinted glass, or directly over defroster wires in the glass, the antenna will not operate properly, but if you install it correctly it should work as well, or almost as well, as an antenna with a regular ground plane mounted on a trunk lid.