In that sense publishing these things is academic and therapeutic.

Obama wrote in his book that he used marijuana and cocaine, and people are OK with that!

One day a came by, unexpectedly, and found the tenant and his friends smoking marijuana.

Hey Nate, I live in Apollo Beach the smell is most likely the Large Marijuana Grow on the 41 or the reclaimed water used in many subdivisions sprinkler systems.

Aside from the obvious (criminal record, evictions, poor credit) I tend to notice most red flags when looking at their social media:-If it's a couple and they've been in a relationship for a short amount of time (I've had 'couples' inquire who got in a relationship that very week)-Posts or photos showing they smoke marijuana.

For example, it appears for @James Carlson legal marijuana is an important factor to consider ;) It is pretty subjective and hard to give advice on.But there are some objective things you can consider too.

Most utility companies have a "landlord policy" where you would be notified if they stopped paying, and the bill get sent to you when they take the account out of their names when they are moving.I allow them to pay separately, and most use Intuit's Payment Network- $.50/ transaction.Put whatever rules you want in the lease, mine includes clauses about medical marijuana, bed bugs, when to take the trash out, that Drano is ok to use, not to use flushable wipes, that light bulbs within the unit are their responsibility, not to turn the heat down below 50 degrees, not to change locks, no guests for more than 5 days without written permission, the list goes on.  

As we know practically anyone can get a medical marijuana card.

At this point, I do a quick google search on my phone and that's when I saw pictures of the house and of the marijuana grow operation that was taking place.

@Rob Bergeron Probably not the best forum for those topics but personally I've been buying marijuana stocks (I don't even smoke).