"I always felt it was better to let them learn the consequences of leaving such things undone for themselves," Minerva comments, glancing over the list. "It is always instructive to take one's time about freeing them from inconvenient situations. That and I hardly dare imagine what such a notice as that one might become in Gryffindor common room. Then, of course, yours tend to be rather different in personality and I had Weasleys for most of my career."
She shakes her head no, graciously. "I shall let the three of you take advantage of the evening without me, if you will not be offended by my bowing out. I have endless piles of notes to cross-reference."
Which means: The temptation to hover conversation-killingly about is much too strong, so I know I ought to resist it.