the costume wearing, convention going types are cringy. the rest are just confusing imo.
people with no japanese background saying things like "kawaii" and "ohaiyooo" in person/public? ;; (i find it cringy still over the internet tbh lmfaooo)
Hm, I guess so. I've never looked into Club Penguin so I don't know much about it other than the fact that the fanbase is largely kids, so yeah, a bit.
It can be. Depends on the community. If New Super Luigi U, then definitely.
Studio Ghibli movies? (If you say yes I will get very angry, in fact I'm only typing this because an IRL friend thinks they are and got mad at me for showing My Neighbor Totoro at my birthday party)