Here's my opinion (and it's just an opinion):
If a label keeps their releases in print, like Submerge (who does an
excellent job of repressing as necessary), then there's no need to
bootleg their product- it's readily available.
If a label wants to play games with releasing limited quantities of a
record and then immediately deleting it (for whatever unfathomable
reason), then fuck 'em - bootleg away.
Che