There is NO guaranteed way to identify a scammer or untrustworthy member.
New accounts don't mean people are less trustworthy but as it costs nothing to create an account, you should use caution.
Having said that, I have seen JrVIP's shitlisted for peanuts.
Look at peoples previous posts, not just what they say but the way the say it.
If somebody is claiming to be banking hard then why are they offering to do a $3 job?
Also if they have previously said they are broke, then where did they get the $10000 they want to pay you?
Talk to the person you want to do business with, to get a feel of them.
Do they post regularly? Do your due diligence and check any details they provide.
The first step and MOST IMPORTANT STEP is to use your common sense.