Yeah, I saw this earlier today as well, and I reported the thread.  Don't know about ethics, but it's definitely against bitcointalk rules.

Looking at some of these ICO threads, it's freaking obvious that that's what a lot of devs are doing and it sucks.  It also sucks that people are so desperate for bitcoin that they'll gladly create 10 accounts just to bump stupid shitcoin threads--but it doesn't surprise me.  Illiterate, idiot 3rd world scuntonies will do just about anything for it, including spamming and all sorts of other questionable activities.  Has this thread been removed yet?