Team
This is very important. Who is behind the project? Is the team made up of well-known members of the cryptocurrency community? Are they known in other areas? Have they been involved in previous projects? If the answer is yes, then this may be an interesting opportunity. Just remember to check if the person is actually aware of the project as scammers may use famous names just to get people interested even though these are not part of the team.
Though all of your checklist on how to avoid scam ICO is useful but my own way of spotting scam is the team behind the project. My thinking is that if the team is not clear or the presentation is doubtful then the project itself is doubtful also. You can also search the name of the CEO in the net and make your own decision on whether he is fake or legit.