I also make the same proposal earlier and I personally believe that a warning message should be there. But below is the response of Welsh merited by mprep.
Sometimes some decission should take by observing situation. In recent times ICO scam has been a concern and by considering this situation i think we should warn our investor.
You have suggested in your thread to make a post including all scam ICO there. Actually your suggestion was not bad but honestly users are not too interested to read pin posts usually. Where IMO showing a warning like gambling section could be a perfect solution.