In its campaign evaluation for Stoptober 2018 (the last evaluation report that is currently available), Public Health England boasts:
Campaign recognition
Recognition of Stoptober continued to build in 2018, with 83% of smokers recognising it. This has been improving continually since the campaign low of 2016 (67%) where there was no TV spend, suggesting that TV plays a role in driving recognition. Recognition of Stoptober is now back to peak levels which have not been achieved since 2015 (80%).
Top level understanding of Stoptober also remains strong – 70% associate it with ‘stop smoking’ messaging, with incorrect references remaining a relatively small minority ...
A small minority? Perhaps, but it's nevertheless interesting (and sometimes amusing) how many tweets using the #Stoptober hashtag refer not to smoking but to alcohol.
Here are some examples. There are many more, believe me.
See also: Evaluating Stoptober