They are allowed. I never said they wouldn't be allowed, I just said in my opinion most of them are horrible and just waste space on j2o.
People can upload them if they want, but I'm personally against it. It sorta makes me think of when I was in kindergarden (5 yrs old) and people were having imaginary hotels with dolls and stuff, and nearly all the hotels I've seen hosted have been levels made in 5 minutes that look like crap.