sorry, missed the important row. but nevertheless i don't know why u should force ppl to have debug output. if someone reports an error he can always turn on debug for detailed reporting.
everyone else that don't like to be forced, have a look at the settings.php
That is true however the parser has two modes, 'full' and 'simple'. If Full parsing fails WoWRoster will fall back to Simple mode. However if people shut off all debugging notices it will happen silently and the missed parsed item will likely go unnoticed until it is too late.
Besides, this is a beta; the point of betas is to find bugs and fix them! Debugging output if a vital tool for us and you to report these issues.