In the case of small Wordpress extensions from individual developers, I think the tradeoff is such that you should basically never allow auto-updating. Unfortunately wordpress.org runs a Wordpress extension marketplace that doesn't work that way, and worse. I think that other than a small number of high-visibility long-established extensions, you should basically never install anything from there, and if you want a Wordpress extension you should download its source code and install it manually as an unpacked extension.
(This is a comment that I wrote about Chrome extensions, where I replaced Chrome with Wordpress, deleted one sentence about Google, and it was all still true. https://news.ycombinator.com/item?id=47721946#47724474 )