Plagiarism is not a simple mistake in most cases, it's a conscious decision that people make in order to increase their post count and make money off of that.
Frankly, anyone who engages in copying other people's work without giving proper credit for it, should get banned immediately without any exceptions.
I don't agree that all did it intentionally and it depends on when and why did the user post the content. It's not like these members kept doing it and are getting excused for this. Everyone has got either a temp-ban or sig-ban and this was because they did it years ago and not recently. Some did it once 4 years back so the perm-ban wouldn't be fair as they have contributed to the forum. Although it's wrong, they deserve a temp-ban in such cases.
We've all seen the excuses in the recent mass ban appeals, first they claim to have no idea why they were banned and then they claim it's 'such a hard punishment' for a 'simple' mistake.
I say bullshit to that, everybody should know that you don't just copy someone else's exact words and pass it off as your own.
There's not a single good reason why long-time members who've plagiarized in the past should be given a second chance. (in my opinion at least)
The members claiming it are taking the forum for granted. Nobody can be unaware of a simple fact that you can't copy-paste other people's posts.
I do have to add that some people might actually 'plagiarize' by accident and those cases should be treated differently.
By that I mean, someone adding a quote from a website to their post, but forgetting to add the source.
Something like that is pretty easy to spot, if they've also added enough unique content to their post and placed the quote in actual bbcode quotes.
The moderator hence is checking all posts to see if the user did it by mistake on intentionally did it and if he is a repeat offender. Some members did it without realizing it is plagiarism and since they have been here for years and done it like 3-4 years back, the 60 days ban is fine. I've also done mistakes of posting emails without adding the source link and just using quotes. Theymos made it clear that this is not considered plagiarism.
Mind you, I've made some stupid posts myself when I was still a newbie, but it never crossed my mind to just copy/paste stuff to increase my post count.
Most people don't plagiarize, because they're just decent persons, so I'd highly recommend not giving any free-passes to those who do plagiarize.
Heck, I'm actually also against the signature bans (instead of banning them) that Bitcointalk gives to high-profile members who've plagiarized, but offer value to the forum.
It's all in the hands of the mods of this forum and I feel even mods are confused of who deserves what punishment. I may not like a person who has plagiarized for any kind of benefit but here the time matters as they are not repeat offenders.
Also, please note that in some cases the
member's account was hacked and the hacker plagiarized posts to get the owner permanently banned. People are taking advantage of this mass ban.