There are people on ET who build up 30-40 posts to look legit then they start asking for people's phone numbers and emails to share their strategies man this is bad
Sadly there are scammers, spammers, and general asshats invading almost every facet of internet life. My general rule of thumb is, if I don't know you personally then you aren't getting my name, address, phone number, or email address. Although I do have one advantage. I run my own mail server so IF I want to give someone a chance I give them a unique email addy that is an alias for my main account. Then if they start spamming, I delete the alias and my main email remains in tact. I do this for every company, web page, etc. that I have to register for.