Those irritating scams in Telegram, you've said it right that many of them are there and just finding someone who's innocent enough with such.
4) Avoid Low grade, Less Secure, & have no proof of record on CMC, Coingecko, etc projects.
I agree with most that you've said but even with such volume and they've got records and listed on these listing websites, this isn't limiting a project to be a scam.
Rug pulls can happen anytime with projects that can be seen there having decent volume. That's why just go back to the #1 tip you've mentioned and do it as much as you can.