To be fair no flag guild would ever be able to compete with well thought out and worded private messages to some whales..
"Oh no we need defence!"
Go buy some STEEM and power it up. Upvote yourself. No more need for defence.
I guess if and when we do see these "security" guilds pop up and start being abused it won't be terribly hard to nullify them by taking out the sites they operate on. >_>