Regex in banlist

Dude was asking about a protected-list of ip's , so I got a better idea.
[04:13 PM] RyBack
: @Razo[R]apiD: I have a better idea, regex. a ban list that can take a regular expression. Would be awesome !
[04:20 PM] RyBack
: but that's only supported in linux and c++11 ?
[04:22 PM] RyBack
: https://github.com/cesanta/slre this looks good


So, what are the cons and pros ?

Honestly regex confuses the hell out of me. I've used it before in javascript, and it's just way too complicated for me.

It makes a difference if u get confused in reading than writing.
but if regex is added it wont so hard to use. since an ip is basically a bunch of numbers with dots in between :D