I’ve already seen number 1 happen. I’ve had a completely unacceptable amount of non-nsfw tagged porn hit my front page being posted to various Lemmy.world communities, all by shitjustworks users. I’m getting pretty close to abandoning the platform myself because I don’t need that shit coming up on my phone when I’m just trying to browse
Edit: that said, I’m not going back to Reddit. I’ll just abandon this type of site altogether and spend more meaningful time with my family and read more books
Oh yeah, that is nice, but I guess at the end of the day it's still just that idea of "I'm a person saying a thing" (and using a hashtag) versus "here's this article I found"
The thing that I think makes lemmy more valuable than mastodon is the focus on content versus personality. With Twitter, you followed people because you were interested in what they had to say and share. With Reddit, you followed communities. So even if a lot of the people don’t move over, once enough of the community does, it’ll feel the same (or better). I was never super active in my various subreddits (although I did comment, I just never posted), but I’m making an effort to comment and vote a lot on here just to help build that sense of community