Also, have you considered riding somewhere that isn't straight? You've got no meat in the middle, but you've got nice, fat, juicy chicken strips on the sides.
The mark observed is from locking up the tire while braking.
Burnout marks would have it evenly worn and ragged margins, discoloration, chunks missing, blistering, or strips of tire missing along the circumference.
Nah, you'll get that wear pattern from normal riding, if you don't replace your tires the second you get to the wear bars. I ride a pretty fair amount on a sport bike, and about half of my commute is on interstates. When I was using Pirelli Angel STs, there were no bars that crossed the middle, so it was hard to tell how much tread you had left in the middle until one day you were down to the belt. That happened to me multiple times--Anget STs last about 5000 miles on a CBR600rr--but hasn't happened since I switched to using Dunlops.