How to detect a scammer(Not a foolish thread this time)

First, sorry for my last bad thread anyway if you wanna detected or know a scammer this is the ways a scammer acts:

1. A scammer may give you a link of an account with many weapons zp for example 11 pages for 40-50$ unbelieveable prices.

2. A scammer may want you to finish fast before he lose courage to scam you.

3. If a scammer loses his courage to scam in the half way in the trade maybe he will say to you: aaaa damn i forgot that my account is blocked or he may say i forgot that my friend know this account or change all his full account info.

4. If you offered on the scammer to use OMM, and he told you i cant use OMM he will tell you: right now i cant use OMM.

5. A scammer may say sometimes things out of topic from his worrying.

I noticed all this from people reporting on scammers and saw full the conversation. I hope this may make people not tricked easily, to reduce scamming and not making people leave this site from scammers.