buttons are not deactivated after they are pressed

[Jan]

I just posted a triple comment because I mistakenly pressed the wrong button and then quickly the right one twice. That is really annoying.

What about adding some JavaScript like this:
document.getElementById('field.actions.answer').onclick=function() { document.getElementById('field.actions.answer').disabled=true };
document.getElementById('field.actions.requestinfo').onclick=function() { document.getElementById('field.actions.requestinfo').disabled=true };
document.getElementById('field.actions.comment').onclick=function() { document.getElementById('field.actions.comment').disabled=true };

Or something more elegant and for all buttons. Or even better, give people some time to review their comment: https://bugs.launchpad.net/launchpad-answers/+bug/80895