You can have the same attitude here.
Always ask questions and answer them on public. Avoid pm.
Many scammers will try to fool you on pm. When you are posting in public many people will give their opinions and maybe even tag a scammer before you notice anything unusual.
Absolutely correct,In Private message usually the way of scammers or even hackers to victimize us.i have lots of PMs in telegram From random person that sometimes I dont know where did they get my telegram since I only joined two or three groups but spammers comes from nowhere
So I think the best option is every time you will receive a PM from random account that nothing to do with you,just report Spam and youll be safe