The entire message, written in questionable quasi-ebonics, reads: "We spy w/our lil [eyes], people celebratin 420 in da Mile Hi. Das ok, we dont really mind. Jus#ConsumeResponsibly or we'll bust u guys. #420Songs"
The DPD has a (recent) history of using social media on or around 4/20 to pass along supposedly hip messages themed to the date.
Here are two examples from 2015, also sent via Twitter:
At the same time, however, the DPD definitely hasn't sworn off arresting people who light up in public at the Denver 4/20 Rally at Civic Center Park or other cannabis-friendly gatherings.
Despite the jovial tone of the above tweets, Denver cops issued 160 citations at 4/20 events in 2015.
The number of citations could be lower this year, since the rally is taking place on a Thursday rather than a weekend. But Denver Police spokesman Sonny Jackson has been making the rounds on local media making it clear that officers will be out in force on 4/20 and will be enforcing public-pot-smoking rules.
By the way, the GIF is plucked from a July 2016 DPD video called "Ain't Too Cool" that is weird AF. See it following the latest tweet.
We spy w/our lil , people celebratin 420 in da Mile Hi. Das ok, we dont really mind. Jus#ConsumeResponsibly or we'll bust u guys. #420Songs pic.twitter.com/YAKw41dGcR
— Denver Police Dept. (@DenverPolice) April 20, 2017