Yea I live in Hanover, and heard about it through my buddy on the FD. Forge Pond does have moving water, there's an inflow that comes from the Indian Head watershed under the King Street bridge, that keeps the ice rather thin for quite a few yards on both sides, it's doesn't freeze over at all in about a 10 foot radius directly on either side of the bridge sometimes. Forge Pond has had people fall through the ice just about every year as far as I can remember haha, people don't know about the moving water, or just don't care. 
Rapidly losing interest in this season! Been to 4 or 5 different ponds and can't get anything going. 1 bass and a few perch! I strictly jig and usually do ok, but not this year. Hate killing myself with the hand auger and not getting anything in return! Excercise I guess! 
I was out on Stetson Pond in Pembroke this morning. Was a little scary! There was a good 4" of ice but it was cracking all around me. I couldn't feel comfortable with all these cracks shooting all around me and bailed after an hour. Too bad because it was a really nice morning. I'm not going in over a couple of perch!
I'm not sure about Spot's thickness... With it being so big and windy, most of it is probably considerably thinner than the other ponds around that area.
But you saw someone out there? I suppose it could've been me... I went out on it in a small cove to the right of the zoo for an hour or so on Tuesday morning. I always fish it at least once a year, sometime early in the morning so if they kick me off, I've already got in a bit of fishing, since the legality of fishing Spot is, err... a grey area.
But on that matter, I did catch a few dink smallies. First smallies I've caught through the ice
But you saw someone out there? I suppose it could've been me... I went out on it in a small cove to the right of the zoo for an hour or so on Tuesday morning. I always fish it at least once a year, sometime early in the morning so if they kick me off, I've already got in a bit of fishing, since the legality of fishing Spot is, err... a grey area.
But on that matter, I did catch a few dink smallies. First smallies I've caught through the ice