I've often played levels that targeted certain players or group of players across on Littlebigplanet. They were addressed to these specific players and a large majority were quite hostile. Of course, me being the nosy person I am, can't help to ask them why they publish such levels, I've been told numerous times to mind my own business, which is something I tend to not do. I also asked why that specific person was targetted and it was to "show the world" who this person was and what he did. In any case, most were about a player copying their object or simply because they do not like said person.
What do you guys think of these levels?
I consider them a form of harassement and if anything bullying.

I really don't know, but if I were to guess, it would be if they were bullied from a player (for some reason) and it's like a revenge thing. It could also be copying a creators' object or the attempt to copy objects. One last thing I would guess would be from jealous players, but I'm not sure why. I have made a level like this before and I ever so regret publishing it. It's under an account that's over 400 miles away.

https://lbp.me/v/ew7w-s/comments?p=1&l=12

Copying objects is so annoying. Have you ever seen those "LBP <insert game version here> in a Nutshell" levels? Basically, they're levels that make fun of LBP. For example, they'd make fun of how LBPK's Cool Levels and Team Picks are never updated, the antics of LBP2's players, LBP3's lack of updates, etc. If I had time to and my PS3 wasn't broken, I'd create my own because the original ones failed to list so many of the problems that plague LBP. The weird bullying PSA levels that people publish just to get attention. Gross costume trends. Bad influences. My little sister had some pretty bad friends on LBP, including this one guy who noticed the game's default knife object in a level and reported it, but literally said before doing so, "This level is so f**king inappropriate! I'm going to report this," or something like that (in abysmal grammar, obviously).

@dakrrs
I guess, but that level still in its own way targets multiple people, a group if you will. I'm mostly speaking about levels that personally address a single person.
Like these to show a few
https://lbp.me/v/qt5wkj6/topreviews?p=1&l=12
https://lbp.me/v/qvzhzr8/topreviews?p=1&l=12