While people may be opposed even in theory to more tame things like a little code completion, there's plenty of room to very obviously notice GenAI slop.
I mean there's the regular "can you really sell code you don't own" kind of thing going for it. The companies have stolen all sorts of data; voices, music, raster, vector, video, books, film. It'd be shocking if they also haven't scraped all the code that's out there on the web.
Some of that is perfectly fine to alter, and sell. A lot of it isn't. There are plenty of FOSS licenses that are restrictive in the sense that you're free to use it and change it, but you can't alter the license of it, and in many cases not sell it.
So when an LLM produces code based on that, what applies?
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Then there's obviously broader problems with ex-developers turned vibe coders coming out of the woodworks talking about how they can't code anymore. I've people at my company joking about this, and the notion scares me. The idea that they've outsourced their thinking and problem solving skills to the point that they're incapable of doing now it is terrifying.
I don't know why anyone would willingly do that.