You can maybe ask these guys:(Who wrote this blog post)
http://blog.thinkst.com/p/canarytokensorg-quick-free-detection.html
To add a honey/canary token for steemit active or posting keys to their site. Which would enable you to see if somebody tries to use a fake made up posting or active steem key that you posted to a frontend, the site emails you if someone tries to use the details that you generated on: http://canarytokens.org/generate
Hope that makes sense? Maybe somebody needs to make a site to track the reputation of steemit frontends.