drop multiple hosts with wildcard

Is there a way to drop all host data for multiple hosts using a wildcard?  I know how to drop a single host and erase it's data, but I have a long list of IP Cameras that I changed in my hosts file and instead of dropping each individual hostname I'd like to drop all hosts that start with 'Cam'.  I attempted this but it didn't remove anything.

./xymon 127.0.0.1 "drop Cam*"

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Kris Springer