Putting Binance listing as target in there roadmap is not wrong since it’s just a goal to achieved but announcing that the token will be listed on Binance with X date without Binance consent or without basis is the one you considered as bluffing.
Of course it's great if the project is really serious about wanting to do it, but I can assure you that only a small part of the thousands of altcoin projects that manage to get a chance to list their products on binance and the rest fail. So even though the team says it will be done in x time period as per the roadmap, then I don't think potential investors should 100% believe it unless the project implements launchpad on binance.
Anyone can dream a high goal such as to become a number to project soon and so on but that doesn’t it was bluffing. Bluffing is when you are claiming for a things that you are certain that it will come but it shouldn’t or giving wrong info to the public.
A bluff is only part of a selling strategy to convince investors, but basically investors must fully analyze whether it is convincing or just a bluff.