To quote Zavier (*high five*) there are plenty of other routes out there that make much much more money, with a little more flexibility for *gasp* RP and have the potential for a little good 'ol fashioned fun.
I tried the diamond/nobium run about four times and just about clawed out my eyes from the sheer boredom of it. Between running past a half dozen stone silent advanced trains and the lack of any conversation aside from system comms occasionally blatting out "2 mill or die"
I say leave the darn thing in place, if some people have an earnest need to invest in the purgatory that is that run then that's their cup of tea.
I say, if anything, install a huge billboard at the entrance of the jumphole in NB urging a change of lifestyle.
What's great about trading is that you can travel anywhere you want, and still make a buck while doing it, and if you're carrying the right stuff the locals might not shoot at you.