Totally bad form to jump ANY unauthorized jump in competition. The only jumps you should jump, at all, are jumps properly flagged and used as it is intended to be used. You never jump a jump you are not supposed to jump anywhere on the show grounds.
I was placed first in a large event and I accidentally jumped a warm-up backwards. BRAIN FART! I didn't know until the very last moment that they decided not to eliminate me. Two others also did the same and the flagging was deemed inadequate. I was lucky and was ready to accept elimination.
not) to get into position to jump an obstacle;
5. DEVIATION FROM THE COURSE
a. It is a deviation from the course when the competitor:
(1) does not follow the course as set out on the published plan;
(2) does not cross the starting line or the finishing line between the flags in the correct
direction (EV154.3e and EV154.3p);
(3) does not jump the obstacles in the order or in the direction indicated,
(4) jumps or attempts to jump an obstacle which does not form part of the course or
omits an obstacle. Obstacles not included in the course should be crossed but failure
to do so by the arena party will not preclude the elimination of a competitor for
jumping an obstacle not forming part of the course.
b. An uncorrected deviation from the course incurs elimination (EV154.2e-.i and EV154.2p)