For me its nice to know that people do read profiles, I had been starting to wonder after the following incidents:
At the start of 2008 we had transactions issues daily for about 2 months(as usual with no warning to people inworld), so to prevent people losing money and a string of abusive IMs, I began shutting my shops during these periods and put on the FRONT of my profile:
"SORRY BUT MY SHOP IS CLOSED DUE TO
SL TRANSACTION PROBLEMS FOR THE <insert ever increasing number> DAY IN A ROW, PLEASE DO NOT IM ME TO ASK WHY THE SHOP IS CLOSED"
Needless to say after a short while my email was full of "is ur shop closed" and "why is ur shop closed" IMs
More recently I decided to provide a service for the "r u online" people by putting on the front of my profile:
"I dont hide online presence, if the top right of my profile does not say "currently Online", then I am not online so there is no need to ask if I am"
Needless to say this gave no reduction in the "R U ONLINE" IM's