In defence of the ACO, they are not just one monolithic entity but just people like us. Some of them understand the needs of British race fans, and others have no clue. The organization is split into the 'sporting' (the blazers) and the 'commercial' (the suits). The commercial and administrative part includes the ticketing department. They outsource the printing of tickets. All the tickets for LM are printed months ahead of time. The same supplier printed tickets for the Moto GP at Le Mans (held shortly before the 24 hours) and it was at the GP that the ACO realised the problem. With no time or means of recalling and reprinting tickets they had no option but to go with what they had, and issue a warning to ticket holders not to leave them in the sun.
Problems with Le Mans ticketing and campsites stem partly from the structure of the ACO organization, and partly from Anglo/French cultural differences. The public faces and voices of the ACO for race fans are the people on the ACO ticket phone lines and on the desk in the 'Rotonde'. Those folks do their best, but they are a long way from the decision makers of the ACO and we should remember that when voicing our complaints.
I've worked with the ACO for many years and all the people I have encountered have been well intentioned and really DO have the best interests of racers and race fans at heart. Over 200,000 people come through the turnstiles at Le Mans each year from all over Europe. The British contingent is large, but not in the majority. The organizers have to balance the needs of racegoers of all nationalities, with the the facilities and funds available. One thing is clear, they are never going to please everyone, and the potential for mistakes and misunderstandings is very high.
One more thing to bear in mind is that the permanent staff of the ACO is not as large as you might think. They have a large number of temporary workers drafted-in for June. No matter how well briefed, these folks also have potential for miscommunication and mess-up (they are mostly French after all).
Yes, I do curse the ACO organization regularly when the wheels of French bureaucracy grind very slowly, and the times when there is poor communication between departments. However, in general they do manage to get the job done (eventually) and they should be respected for having have kept the 24 hours of Le Mans alive (with short hiatus for war and national strike) for 89 years.