“We've learned that you should never trust English professors who stick computer chips in their arms, breakfast cereal mascots, Stephen King, the Borg collective, vegetarians, Christians, Microsoft Word helpers and people who put five exclamation marks on the ends of their statements.”

Variant: Multiple exclamation marks,' he went on, shaking his head, 'are a sure sign of a diseased mind.
Source: Reaper Man

Oberleutnant Ehrlich, wounded German POW, p. 237
Killing Rommel (2008)

a remark made in the House of Commons responding to a Laborite speech; reported as unverified in Respectfully Quoted: A Dictionary of Quotations (1989).
Disputed

Source: Alice in Zombieland

Source: My Horizontal Life: A Collection of One-Night Stands

Source: What On Earth Is About To Happen… For Heaven’s Sake? (2013), p. 5

"Class Struggle on the Desktop"
In the Beginning... was the Command Line (1999)

A Call To The Stars II: A Home In The Sky, verse 2, lines 5-11
A Call To The Stars II: A Home In The Sky (2016)