Everyday, we face some threads here in bitcointalk with complain that people are targeting others to scam.
I found some people are doing that in different ways. Yesterday, I have visited a IEO group and asked for attention from admin. Couple of minutes later, someone knocked me and started to ask if I want to invest? He claimed he is an admin of that IEO group. I checked his profile and the admin from the group. For a moment I was a fool. The scammer who knocked me was using the username of the original admin, in his (scammer) bio profile.
But, I further looked and got different.
Don't send any fund if anyone asks you, no real project's admin will PM you.
I faced the same kind of issues many times. Once someone knocked me to help him to withdraw his BTC. I have to log in a website and withdraw his BTC and for that, I will be paid a good amount of BTC. Then I search about the site he provided and found It's totally a phishing site. People become greedy Because scammer offers good amount in return. Another problem is, unknown people add me on many groups without my permission which is very annoying. I simply report spam and leave.