In reply to FactorXXX:
Possibly, I'm not sure - but I'd argue that people who got lost in the mist without a compass, or started fires with disposable BBQs did not in fact take reasonable steps to minimise the chance of mrt, fire brigade, etc being called out even if they claimed they did. To me, being reasonably prepared means having appropriate navigation tools (and knowledge of how to use them), clothing layers, sufficient food and water etc (obviously depending on exactly what you've got planned). I think there's a reasonable consensus among outdoor enthusiasts about what it means to be prepared. Being prepared reduces the chance that you'll get into difficulties, and increases the chance that if you do get into difficulties you'll be able to get yourself out of them too. Some people were obviously not reasonably prepared, or were irresponsible (e.g. with disposable BBQs).
Of course, however well prepared you are, you can accidentally trip over a rock and break your leg, or make some other mistake resulting in you needing help, which in the current climate potentially puts people at risk of transmitting coronavirus. But, by being prepared and being sensible I'd argue that the risk to others is actually pretty low now, and at an acceptable level. To me, outdoor activities are among the lowest risk activities in terms of virus transmission - we're naturally socially distant, don't share facilities or indoor spaces, and only very rarely need any help from mrt (anecdotal, but I don't personally know anyone that's ever needed rescue). Personal transmission risk is easily reduced by distancing from others, using elbows / gloves / hand gel to open gates etc.
Even without the coronavirus there is a non-zero risk to yourself and others every second of the day, whether you go for a walk in the hills or sit at home watching TV. I'd argue that the increased risk from transmitting coronavirus is low enough that it's reasonable to go outside not only legally, but also ethically.
You may disagree, as people will evaluate risk differently. But I'd counter and say when will the risk be acceptable if not now? When track and trace reaches full 'world class' status? When the number of new cases is down to 100 per day (which may never happen)? When we have a vaccine? When the virus has been completely eliminated? When every single potentially harmful microbe on the planet has been eliminated? Or is it unethical to go into the hills full stop if there's a chance we may need help from mrt, as they might trip and break an ankle on their way to rescue us?