Marg made the point that the protests from the other night were about increased university fees, not royals. 'Off with the their heads' weren't the only things chanted, more prominantly were 'Tory scrum" and "It's your government!" The protesters were complaining about the government and Charles and Camilla were seen as representatives of that government. The protest was against the government!
Even currently there aren't enough Brits who have strong enough feelings to protest about Camilla becoming queen. The current Prime Minister supports the idea, young people don't have strong enough feelings to hit the streets, they care more about their education and having to spend the rest of their lives paying for it! It's older people who contain the strong anti-Camilla brigade, will they be around to make a major protest? They didn't even manage it for the 10th anniversary of Diana's death, or the inquest into her death. About 100 people were at the memorial outside the Guards Chapel and daily a handful of people turned up at the inquest. Much to the surprise of the organisers who prepared for 100s. The numbers who leave flowers at Kensington Palace on the anniversary of her death has now dwindled to less than 50 (2010) So I can't see a mass rising of the people complaining about Camilla becoming queen, there will be your hardcore, but in the future they will be considered insignificant.
I do agree with Bertie too, should the current Queen live another 10 years, then it will be pretty certain that Camilla will be Queen consort with no controversy.
A little piece of annoyance with me, why do some Americans always try to perpetuate the idea that the monarchy is teetering on the edge of oblivion? It's not and although the abdication rocked it somewhat, Diana's death, irrespective of what the tabloids wrote didn't cause any teetering closer to the edge! Republican support in the UK has remained steadily under 10% since the 1870s!!! The highest profile republican politicians were in the 1960s and 70s, the movement "Republic Now" that the newspapers ask for commentary whenever they want a critical reaction to any royal has a very small membership base. The institution that is the British monarchy is far stronger than individual personalities, it's part of people's lives.