I can't imagine this hasn't been answered on Meta already, but I couldn't find it by searching.
How should one deal with answers posted mistakenly believing SO to be a message board? My example is this answer on Server Fault, where it appears the answerer found the question via search engine, and created a new answer asking more questions of the OP.
Is this an appropriate item to flag for moderator attention? "Please flag with care" always makes me hesitate and back out 90% of the time I'm tempted to use it, though I suppose that's the point.