Is it correct to say that one who smokes cigarettes is disrespectful? With evidence.

Smoking is forbidden (haram), and whoever does it must repent to Allah. As for the saying "not respectable" concerning a female smoker, it is preferable to avoid it, but it may have become common among people because a woman's smoking is one of the most detestable habits that have spread among corrupt women. This expression has thus become a customary term used in this sense.