This is always a tricky one. I’m often approached during set up or packing up by a curious visitor and I’m more than happy to give a quick overview of what I’m doing [it has to be quick else their eyes start glazing over if I make it too long]. But whilst I’m in the middle of a CW activation especially during a pile-up, I need total concentration to catch those 429 chaser callsigns so I (literally) keep my head down and hope the visitor doesn’t interrupt me.
On activating at the summit trig point / cairn / other feature I’ve learnt long ago not to activate right at the summit no matter how remote I think the location is. Sod’s Law has confirmed that walkers will show up mid-QSO and want to touch / stand on / have lunch at the summit feature.
Sometimes a walker can be quite unreasonable that you are even at the summit …