Yikes - I better be careful what I write here. (Only joking).
It's often difficult to tell the tone of somebody's reply in a message and sometimes it can be easy to take offense at something. Some people have great difficulty using computers, or typing, and some have physical handicaps preventing them from writing much at all.
Some people do not reply at all, or do not even think of replying. I help people on RootsChat as an administrator and a lot of the time I don't even get a "cheers" after unraveling problems. It doesn't stop me from helping them again as I tell myself that perhaps this next time they'll thank me, or say "Cheers".
Trystan