Up to a dozen pot plants can be grown indoors as of today
The legalization of recreational pot as of today in formerly puritanical Massachusetts is indeed a much overdue milestone, but I will not be lighting up to celebrate.
My two major concerns are both related to public safety. Since there is no accurate equivalent of a breath test machine that now makes drunk driving prosecution almost a slam dunk I worry police and the courts will have a hard time proving charges beyond the shadow of a doubt.
In fact the courts will have a hard time keeping up with prosecutions since most cases where a breath test was taken (otherwise the driver automatically loses their license for six months) and failed usually end up in a 24D plea deal which eases congestion on the system
But without a reliable scientifically proven test for pot intoxication those arrested will have a higher incentive to take their case all the way to jury trial and the courts are pretty overburdened as it is.
My other concern plays into a reoccurring nightmare of a late night major structure fire in a less than well maintained converted single family home with a few too many tenants, some of whom decided to grow marijuana in a dark closet or the basement.
In fact the most recent major fire in Amherst was due to an electrical overload (although not due to marijuana cultivation). And marijuana plants require high intensity lamps to cultivate which more easily overload regular household circuits -- even those that are up to code.
When fire comes calling you better have your wits about you, otherwise you don't get out alive.
UMass is already taking precautions (email to staff & students):
"Although Massachusetts voters recently approved a ballot measure permitting the possession and recreational use of marijuana, federal laws, including the Drug Free Schools and Communities Act and the Drug Free Workplace Act, require recipients of federal funds to prohibit the use, possession and/or cultivation of marijuana at educational institutions, regardless of state law."
"The use, possession, or cultivation of marijuana is therefore not allowed in any university housing or on any other university property. University staff will continue to enforce current policies regarding controlled substances, and any student who violates university policy prohibiting the use or possession of illegal drugs on campus may be subject to disciplinary action."