I think good advice is, just because you chat to others on a forum does not mean you must trust them implicitly, they are in fact strangers and even if you do meet physically treat them like any other person you meet for the first time. Ask for references.
You don't have to be a snob about it but remember that wolves allways dress in sheeps clothing.
You know the story, "trust me, I read the Bible every night" etc.
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