Njay - It's a pretty bad problem, but I think keeping tabs on your groups and making sure you are only posting relevant content (ie, if the group rules state no links, don't post links) then you have a good chance of avoiding it.
HOWEVER, if you are SWAM'd there really is no recourse. I have found that switching groups is the only solution, and it does work. Have you had issues with this?
Did you measure both when the (remote, physical) phone
of the called party began to ring, and when the caller
began to hear a ring, or just the latter?
HOWEVER, if you are SWAM'd there really is no recourse. I have found that switching groups is the only solution, and it does work. Have you had issues with this?