Well, it boils down to the definition of trouble v; how do one say 'www'? Do you say 'we we we'? or is it, like the Thai say it, 'Woorl Wiiee Weeeb'? Some say 'we dot', or is it 'Triple double v'? So that is where 'trouble v' comes from. The right side of the statement is, I have to admit, a bit murky. Yes, I know w is pronounced double u, which is strange in itself. It should have been double v all along, someone long ago indeed had a muddled mind.