I've been considering this problem myself and I believe there are ways to get around the limitations you've described. It's not pretty (from an ideological pers

I've been considering this problem myself and I believe there are ways to get around the limitations you've described. It's not pretty (from an ideological perspective) but it does work and is mostly invisible to the end user. The problem is when users hit those weird edge cases where the hack becomes visible. :-/