Huh? Never heard anything about such signage outside of TWOK.Way back I believe there was a suggestion of putting “no smoking” signs on the bridge and elsewhere on set. The idea was nixed because they wanted to convey the idea no one smoked in the far future and to avoid any inkling of product placement.
Also, there's a difference between not showing people smoking and putting on-screen signage that might offend sponsors. And Trek had tobacco company sponsors.