[tinkthank]

What do you mean, "lost"?

Of course it is important to thank people who help, even if it is just a handy tip or whatever on these Boards here.
I have the sinking feeling, however, that this announcement may not have the effects you are looking for: this type of "remember to say thank you to grandma!" is an important pedagogical device necessary in educating children, but adults rarely like being treated as such. I think that the vast majority of the people here are decent and grown-up types, who already know that they must say thank you to grandma; those who don't know this already will probably be turned-off by official admonishments. But maybe I'm wrong.