I rate bottled just above canned beer, well below draught. I wouldn't mourn he loss of one bottle... and then it also depends on the brand.
Lager - or Pilsner if you like - wouldn't be such a loss as I'd take the perpetrator to the Hague for crimes against the brewing industry (a shade higher than war crimes or the like).
A good bottle of ale still isn't of the standard of a firkin, or even a full vat, as the stuff ain't as tasty as draught, but it's still a reportable loss to world heritage.
Some brews don't come draught, though, like 'stingo' (barley wine, which is a sort of beer). I knew a colleague in Nottingham who drank barley wine and Guinness, the latter a half pint on draught. There is also a brew that's never bottled or canned, and it's something like 60-70% ABV, only saleable in half-pints when it comes to Wetherspoon's during World Ale/Beer festivals. I think it goes by the name of 'The Dog's Bo****ks' or something like that, and it's got a kick like a demented camel (www.jdwetherspoon.co.uk).