Good you checked the forum history, but check where it counts, like the NHTSA database (I did a few years ago): very few cases reported, although the NHTSA makes it relatively easy to file.
It is often expressed here that this is viewed more as a maintenance issue rather than a safety issue. Many ST1300ers are good wrenchers, so issues are resolved (often via the [now disconnected] White Courtesy Phone) without much fuss and no official reporting. Little chance Honda will spring into action without more pressure being applied.
The GW community had better luck "gaining traction" with the SMC issue on the GL. Last time I called Honda, they had one line entirely dedicated to this GL recall:
"American Honda Motor Co., Inc. (Honda) is recalling certain model year 2001-2010 and 2012 GL1800 and 2001-2005 GL1800A motorcycles. The rear brakes of the affected motorcycles may drag after the brakes are released. CONSEQUENCE: A rear brake that drags may increase the risk of a vehicle crash. Additionally, extended riding with the rear brake dragging could generate enough heat to result in a fire."
Sounds familiar....?
The GW community is of course much larger, possibly more affluent as well and thus more prone to sue, so it makes sense for Honda to be cautious.
On the ST side however, the community is much smaller and more self supported and far less vocal, so the
Pinto approach is good enough!