Ask HN: Is it time for software developers/engineers to unionize?

I've seen an increasing number of HN posts on the subject of how software developers/engineers are almost universally underpaid relative to the value they bring. The collusion between Apple, Google and others to keep salaries down and block poaching suggests that this is a systemic problem. There are sites out there like Glassdoor that offer some transparency -- but for the most part this industry is very opaque. The average software developer/engineer is left with only anecdotal information to gauge their value in zsalary negotiations.

So my question for HN is this: Would software developers/engineers benefit from a union? From a collective bargaining standpoint, would a union give software developers/engineers a leg to stand on? What would the backlash be from the tech industry if developers/engineers unionized in large numbers?.