Use (abuse!) of strobes
Why do so many light aeroplane pilots insist on having the strobes on from engine start?
PLEASE they should only be used for flight. So only put them on when you enter the runway for take off, turn them off after vacating the active. Also use when crossing the active.
They're proper name is HISL, HIGH INTENSITY strobing lights, and can cause problems for other people on an aircraft manoeuvring area, eg refuelers and marshallers. So, also don't have them on when at the hold, they can cause distraction to pilots landing.
Please be considerate of others. (OK I'll accept that some aeroplanes have their rotating beacon and strobes on the same switch, which is a silly design, but still consider switching both off if your approaching the fueler or marshaller).
Bad habits can be stopped, just like watching some idiot today (yes, with strobes on) brake to a halt with the engine still at high power!
Come on instructors, flying clubs, owners persuade your pilots to think a bit.