Actually, I'm thinking about stealth rules for forum wars too. My next battle has one.
If you took an overview shot of the field, centered on the stealth unit, with a ruler on the side for scale, then the player with the stealth unit could use MS Paint to plot his movements. He wouldn't even have to report them to the host, just keep the pictures so he has a record of his movements. Then, when he's ready to come out of stealth and attack, he just PMs the location to the host.
Just one random act of violence can brighten your day. Especially if it involves explosives.