Yes, there’s fediseer that can help with that sort of thing. However, I think if it wasn’t spam, it may not get noticed as quick as you’d think. Create a lemmy.world account, post a meme, and use your special server to throw 50 or 100 upvotes at it, and probably no one would realise.
I didn’t intend to imply that by using the same username across instances you were breaking some sort of rule. Different instances have different moderation policies, different federation policies, and different intents. Having multiple accounts in good faith should not be an issue and was not what I was trying to imply.
Rather, the intention was to show that we know bad actors do this with nefarious intent. Here’s an example (they show zero comments as they have been banned with content removed - also I think these ones only had posts not comments anyway):
We very often see the same username created across many instances, it’s very easy to do and Lemmy has no protections against it. Plus, there are no protections against creating multiple accounts to upvote your own posts (don’t get any ideas 😆). IP blocks wouldn’t work as instances are entirely independent, so there is no sharing of IP info across different instances.
Currently there is at least some level of coordination across instances, though, such as Lemmy.world’s Defense HQ, where instance admins can share info about spammers/trolls so we don’t have to wait for a report from one of our own users. There’s also Fediseer, but this protects against spam instances not spam accounts on mainstream instances.
I’m an instance admin and see heaps of the same stuff being posted. Pretty sure it’s one lonely troll not lots of people. Even in this thread, it’s all one user account not lots of different people, but we see the same stuff posted across lots of brand new accounts in a very similar way.
I have spent a lot of time around a lot of IT workers and I am literally the only person I’ve ever seen on a project that has an ad blocker installed in their browser.
It’s only beginning, it has nowhere near the features of RES, and mainly it helps with issues related to lemmy federation. But if there’s something you want, the dev is pretty open to new feature suggestions.
Lemmy Instance Assistant It does things like if someone links a post and the link takes you to the post on another instance, it adds a button to show the post on your home instance. You can also right click on a page (say, an article on a news site) or image and choose the option to share it on lemmy, which creates a new post. It also has stuff to help you when you click a link to a community but the community is not federated to your server, or you can go to the list of communities on another instance and it will have links to take you to that community on your home instance. That sort of thing. Basically the beginnings of a RES for lemmy.
I also like Dictionary Anywhere, which lets you double click on a word to get a definition, a bit like the one Google one for Chrome.
There are also various container extensions such as a Facebook or Google one, that isolates those sites to attempt to prevent that activity being associated with your activity on other sites. It can be a little annoying to get used to but I use them. The annoying thing is that when you click say a google site from a search result on duckduckgo, it closes the duckduckgo tab and opens the site in a google container, but then you can’t click back to go back to the search results.
The general container tabs extension is good too. It keeps separate cookies per container. So say if you have 3 different microsoft accounts, you can create different containers. Then you can open a new tab in a specific container and it will remember the account you logged into last time in that specific container, but doesn’t affect other containers or tabs not in a container.