Personally I like this simple guideline:
You are responsible for your own conduct and communications while using the Service and for any consequences of that use. You may only use the Service to send and receive messages and material that are legal, proper and related to the particular Group. For example, when using the Service, you will not:
defame, abuse, harass, stalk, threaten or otherwise violate the legal rights (such as rights of privacy and publicity) of others;
post any inappropriate, defamatory, infringing, obscene, illegal or unlawful Content;
post any Content that infringes any patent, trademark, copyright, database right, trade secret or other proprietary right of any party (the "Rights"), unless you are the owner of the Rights or have the permission of the owner to Post such Content;
post messages that promote pyramid schemes, chain letters or disruptive commercial messages or advertisements, or anything else prohibited by the Group owner.
download any file Posted by another user of a Group that you know or reasonably should know, that cannot be legally distributed in such manner;
impersonate another person or entity, or falsify or delete any author attributions, legal or other proper notices or proprietary designations or labels of the origin or source of software or other material contained in a file that is Posted;
restrict or inhibit any other user from using and enjoying the Service;
use the Service for any illegal or unauthorised purpose;
remove any copyright, trademark or other proprietary rights notices contained in or on the Service;
interfere with or disrupt the Service or servers or networks connected to the Service, or disobey any requirements, procedures, policies or regulations of networks connected to the Service;
use any robot, spider, site search/retrieval application, or other device to retrieve or index any portion of the Service or collect information about users for any unauthorised purpose;
submit Content that falsely expresses or implies that such Content is sponsored or endorsed by InteSoft;
create user accounts by automated means or under false or fraudulent pretences;
promote or provide instructional information about illegal activities or promote physical harm or injury against any group or individual; or
transmit any viruses, worms, defects, Trojan horses, or any items of a destructive nature.
Psalms 144:1
Praise be my Lord my Rock,
He trains my hands for war, my fingers for battle !