No warning??? On every UA flight I was on last year, the no smoking policy was stated during the pre-flight safety deal. Then (whether it was video or FAs doing the safety deal), the purser announced "Smoking in the lavratory or tampering with or destroying lavratory smoke detectors is a violation of federal law."

Seems like a pretty stern warning to me...

I do have a lot of sympathy for nicotine addicts, but am still pleased by swift and harsh penalties for risking lives to feed that addiction...