Frazzled wrote:Maybe we could spread rumors that Penn was working for the Mexican government, and was instrumental in them finding Chapo...

Rumours not necessary. It was at least in part the truth, it has already been confirmed that clues from Sean Penn and Kate del Castillo helped lead law enforcement authorities to Guzmans whereabouts.
The thing is it appears you would like to imply Penn was in on it. It was just a lot easier to follow his trail than Guzman's. We don't know what specific clues Penn dropped, but it doesnt really matter. Tracking him was a logical stop to tracking Guzman and it is not like Penn doesn't want to be found.
We can only guess at what happened.
The Sinaloa are not idiots they would have arranged for Penn to temporarily disappear to be transported covertly prior to the interview. But he would have departure and arrival points and intel could be gained from those.
The intelligence agencies could organise a 'creep', raiding Penns studio or where he kept any
raw unedited footage, copying it and exiting without any recognisable trace. That would say a lot.
Penn could also be interviewed by a pretty blonde or some such. He isn't exactly the sharpest tool in the box and could give away a lot in open conversation.
I bet a dime to a dollar CIA were all over Sean Penn for the last few months, and he probably wasn't aware of it.