This is perhaps the difference between the UK and the US. The US went with Ghostbusters - let's kill the fuckers - whereas the UK tried to encourage spectres and to give them a useful role in our society.
infinite zest To be fair, the Ghostbusters had a best friend in the cartoon series and his name was Slimer. Bad ghosts need the containment unit but the good ones can stay. Also, we had Casper. The US is Ghost Friendly too ya know :)