Question for Spiritual Witnesses only: Where in the KM does it say not to be on facebook or twitter?

[Loyal Person]

Someone told me it was wrong to be on this site.
We have been counseled not to talk to people we do not know.
Can we know a person from their answers and questions?
Couldn't we know someone in real life and they could be lying and really be a wolf?
Posting on here is not talking to someone you do not know, it is like posting on a blog or personal web page but more effective as many read it.
Please give me your opinion.
Not by choice the validity of using this forum has been presented to a group of elders teaching the pioneer school in Alaska.
Will you continue on here if directed that it is not valid service?
For me means nothing as have seen benefits to self and others.