They're a forum where members participate in group trolling, stalking, doxxing, and harassment of their targets.
lemmyng
Do you know the main function of freshmen courses? It's to make sure that every student has the same base knowledge before going into sophomore level courses. It's giving the students from shitty high school backgrounds an opportunity to catch up with those from private schooling and those from school boards that didn't provide sufficient challenges. These courses don't need a higher teacher to student ratio, they just need students to pay attention to the lectures and talk to the TA if they're stuck.
I don't know how you extrapolate "no emphasis on learning" from "large classes". The classes are large because they can afford to be large. They teach introductory courses, and their goal is to even out the baseline before the students go into sophomore courses. Freshmen come from many different education systems - private vs public, local vs out of state/province/country, fresh out of school vs returning to education after working, etc. This is also why these courses can be graded with standardized testing, because they set the standard themselves.
That may work in senior courses, but a freshman class with hundreds of students needs standardized tests.
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And get rid of the pornoscanners.
You're missing the forest for the tree here.
Given identical client setups, two clones of a git repo are identical. That's duplication, and it's an intentional feature to allow concurrent development.
A CDN works by replicating content in various locations. Anycast is then used to deliver the content from any one of those locations, which couldn't be done reliably without content duplication.
Blockchains work by checking new blocks against previous blocks. In order to fully guarantee the validity of a block you need to guarantee every block, going back to the beginning of the chain. This is why each root node on a chain needs a full local copy of it. Duplication.
My point is that we have a lot of processes that rely on full or partial duplication of data, for several purposes: concurrency, faster content delivery, verification, etc. Duplicated data is a feature, not a bug.
I would argue that duplication of content is a feature, not a bug. It adds resilience, and is explicitly built into systems like CDNs, git, and blockchain (yes I know, blockchains suck at being useful, but nevertheless the point is that duplication of data is intentional and serves a purpose).
The most likely explanation for requesting a video is to weed out low quality AI-generated "vulnerability" submissions that hallucinate code that doesn't compile or APIs that don't exist. In that context a 1 minute video showing that the report is viable is not much to ask for.
Until you sport too much and get an injury, and then it's just a chain reaction of things breaking down because you can't exercise them like you used to.