Basically, all Purvis & Wade one-liners are crass. But I especially loathed the following bit from TND (not easily identifiable who wrote it, but still):
M: Remind her. Than pump her for information.
MM: You'll just have to decide how much pumping is needed, James.
JB: If only that were true of you and I, Moneypenny.

I am afraid P&W are absolved from all wrondoing in this case. As far as I know, TND was written only by Bruce Fierstein. I don't think they had time to have a dialogue brush up done by any outside writers.

I know P&W had nothing to do with
TND, but Feirstein wasn't the only writer on
TND- only according to the credits he was. I believe there was also talk of a Donald Westlake treatment, and a brainstorm session was conducted, involving the likes of Robert Collector and Nicholas Meyer. Meyer was then asked to write another treatment 'on the strength of his ideas', aided by David Campbell Wilson and Daniel Petrie, Jr., after which Feirstein was brought back in. I guess there's something of a shared guilt concerning the 'pump her for information' line.