I always have the seconds on (Ubuntu) and it's a good feature. I leave work every day at 17:28:15 sharp, otherwise I will miss my train (London DLR) and yes, seconds matter in this case.
If that isn't satire, how are you using the on-screen clock to do that?
Do you start staring at it at around 17:20 (or even earlier?) and wait for it to hit 17:28:15, or is your internal clock so good that you only have to start staring at it at 17:28:00?
Either way, why spend time staring at an on-screen clock if you also could spend that time walking to the train station, or even walking on the platform?
I would find some tool that allows me to set daily alarms at around 17:15 (as an early warning to finish whatever I am doing) and 17:28:15 (as a sign to leave now), so that I wouldn't have to waste time staring at that clock.
It's not that hard once you're used to it. I just glance at the clock several times towards the end of work to know exactly when to wind things down and stand up from my chair at exactly 17:28:15. The optimal time was determined by observing elevator business patterns, crowd thickness downstairs and delay margins of train arriving at my stop.
Do you start staring at it at around 17:20 (or even earlier?) and wait for it to hit 17:28:15, or is your internal clock so good that you only have to start staring at it at 17:28:00?
Either way, why spend time staring at an on-screen clock if you also could spend that time walking to the train station, or even walking on the platform?
I would find some tool that allows me to set daily alarms at around 17:15 (as an early warning to finish whatever I am doing) and 17:28:15 (as a sign to leave now), so that I wouldn't have to waste time staring at that clock.