@Nuria: you seem to have missed my point, which is that http://handlebarsjs.com/ is just one implementation of the design. Other implementations exist -- 28 of them are listed at http://mustache.github.io/ alone -- and some of these offer a more principled approach to escaping.
In particular, I keep mentioning the [spacebars] implementation, which is based on [htmljs] and is a structured template system, without the need for any explicit escaping. --scott
[spacebars]: http://meteorhacks.com/meteor-weekly-spacebars-tired-meteorite-autoupdate.ht... [htmljs]: https://github.com/meteor/meteor/tree/devel/packages/htmljs