I know several landowners who wouldn't get too excited if they spotted a lamp flicking on and off across their land in the middle of the night....but a 4 x 4 trooping about....well, that'd be a different thing all together....who's to say that 4 x 4 ain't pulling a trailer and in that trailer is 50 of the farmer's ewes/lambs...and who could blame a farmer for phoning the police in such circumstances....
See, this is the way I see it....if you're running about a farmer's fields in the middle of the night in a 4 x 4 with no permission...ie, illegally you're a proper A1 100% bona fide f*****g