well i am a pilot and have had situations like above;
i beleive there is a rule that states that if a Pilot deems it nessecary to have increased separation with preceding a/c; he should advice ATC
before he/she accepts the line up clearance e.g. T/O clearance
Therefore if you guys clear an aircraft and he/she does not act on that clearance while he did line up, make him vacate the runway immediately, that'll teach him for the next time!
Pointer
