I'd have to say I take both sides here!
Alot of Riders (Sportbikes specifically), give other riders a bad name. I'd like to say I am a very conservative rider and very cautious, however...if it's my turn to go (Only God knows), then anything could happen. Friends give me shit because I haven't gone over 110mph, but to me, no road is long enough / no side streets, to go that fast! It's my life and I'll do what I feel comfortable doing and HAVE FUN! There is still that chance that I make a careless MISTAKE or another driver takes me out! Way too many accidents are from careless drivers (in cars, on cell phones, etc...not paying attention), and the person on the bike gets the $hit end of the deal.
For the guy that was pushing himself too hard and died (in the most recent thread)...It was his time. Maybe he was pushing himself (I disagree with doing that-go at your pace!) but what are the chances he goes off the road and hits 1 single pole? He could have easily landed in a ditch and survived.
The girl that went down @ 54&41...a car did a u turn in front of her...doesn't sound like speed was a factor. Racing on public roads is insane and one day you'll pay the consequences, fatal or not!

As far as the rider down threads being mainly sportbikes, I have to say, I hear alot of cruisers/harleys down too. Maybe we hear of the sportbikes...MORE because they are the majority of the people who post on these sites.

I love riding! I've considered giving it up because my life is important to me, but it's hard...it's something I enjoy.

Just my thoughts! EVERYONE be safe and have fun!!