A Takeover Defense Renaissance?

Yesterday's SEC Currents has an article about the return of the poison pill:

"With stock prices so cheap, can companies withstand a feared rush of hostile M&A? A gleam in the eye during the frothy, high-priced days of yesteryear, hostile M&A is back, and so are the fears of it, in even bigger ways. To counter this, companies are rushing to acquire defensive-wear against these hostile attempts, including poison pills and staggered boards, among others." LINK