1. Do you attempt to "hide" multi-boxing? Run from instance to instance and hope people don't see? Never go into a city as a group? etc?
Nein! I do chain heal stars in main cities whenever I can for the attention whoring.
The only time I leave my slaves outside of a city is if I know there's going to be mega lag.

2. How often do you get hate whispers?
I've had 2 in the month and a halfish I've been boxing. One apologised a little later after a chat.

3. How often do you get reported?
Wouldn't know. GM's never spoken to me about it.