This does not implement *nix Glob Patterns, but rather simply uses Lua patterns. Nobody in their right mind would do rm -rf .* in their terminal - that will not remove all files, but rather only hidden files (files starting with a dot in their name)!
The only function provided is not exactly useful; how often do you need to kick multiple players based on a pattern? I could imagine this being useful only in very rare cases where an attacker is dumb enough to make his names follow a pattern. What makes this even more useless is that the Minetest chat features tab completion for playernames.
What I could see being useful: Actual globs, e.g. for file traversal purposes, but as an API rather than user-facing chatcommands.