I read this as [Massachusetts Bill to Ban] [Non-Competes backed by Spark Capital], rather than [Massachusetts Bill to Ban Non-Competes] [backed by Spark Capital], so it's good to see that Spark is backing the ban.

In general I think the state should take a utilitarian perspective in matters like this. If non-competes hurt the economy more than they help it would be self-defeating for the state to enforce them.

I'll leave the rest for politicians and pundits.