thing with these tours is that there is always a "sea of red", the last two tours i watched (aus 2001 & nz 2005) the BIL supporters outnumbered the locals as well, its a huge thing in the UK and it doesn't cost that much for them, tickets are pricey (in any currency) but the accomodation is cheap and the booze (most importantly) cheaper. Its one big party for them.
As much as we whine and complain, Loftus is sold out and the coffers are full (granted a few seats were empty in Durbz) but the money is being made and the seats are sold at the increased prices. IMHO they can justify their high prices because this is something that happens once every 12 years, if the seats were empty then i would have a problem. Although I do have a problem for the midweek/tour games, those were poorly supported and that can be blamed solely on the ticket prices!