Actually, I believe that suggesting an illegal act could fall under aiding and abetting.   That it would stand up in court in a case like this is perhaps far-fetched, but is certainly possible and not worth the risk.
According to 
http://definitions.uslegal.com/a/aiding-and-abetting/  here is the legal definition:
"Aiding and abetting generally means to somehow assist in the commission of a crime, or to be an accomplice. It involves a plan to commit a crime or to commit acts, the probable consequences of which are criminal.
An accomplice may assist or encourage the main offender with the same intent to have the crime committed, but does not necessarily have to be present when the crime is actually committed. However, without sharing the criminal intent, one who is merely present when a crime occurs and stands by silently is not an accomplice, regardless of the harm that could've been prevented if he/she had acted."
And yes, there are certainly game wardens or spouses of such on this site.  There are surely law enforcement officers here as well.  I am sure they are on here for the same reason we are, but expecting them to look the other way when discussing felonious acts is presumptious.  In my opinion, as jenns peeps said, it is not a good idea to suggest illegal acts, especially on a public forum.  
To OP, I suggest covering their run for a while.  Hawks are migrating right now and yours will likely move on.  It's a bummer for the chickens to have to be on lockdown, but it's probably your best option to keep them safe.  Good luck.