And I'm not talking 'distance' here. As we all know, a lot of T/Ps are on private land, behind fences, in secure enclosures etc. Deviating a few yards from a designated public RoW to get to a pillar is one thing but clambering over fences or walking through crops is something else. From my own point of view, I'm generally happy about leaving a RoW and following field boundaries or going through (or over) gates to reach a T/P providing I'm not actually being watched or on a farmer's doorstep, so to speak. A few of times I've been up to a farmyard to ask permission and only once has that been refused but I only do that if I can't reach the T/P by another route (I have this 'thing' about farmyard dogs!). On the odd occasion that I've been approached, an honest explanation has sufficed.
So... I'm not expecting anyone to admit to doing anything downright illegal, but in general terms, where do you draw the line between considering that a T/P is 'reachable' or considering that it isn't?