Player vs. player sniper-maps can be fun in MP, if just done right. I remember an excellent one we had for Arma2 in Tacticalgamer.com: You had a central objective, a bunch of buildings sitting next to a marsh filled with rubble and surrounded by hills, and the all-human sniper-spotter pairs would start out separately about 2 km from the objective. Each pair's goal would be to get within the fenced area at the objective and remain there as long as they could, each minute bringing in a set amount of points. Some excellent games resulted from this. The fun really started when you took the objective yourself, because once you were inside one of the buildings you didn't exactly fancy looking out of the windows