Not a classic lunatic, but this person seems to be doomposting on linkedin
Alt text: two posts from the same person on LinkedIn.
First post is someone dressed as spiderman lying on the ground in a park while it rains.
Second post is an apparently naked person floating in a water body in a boat with their limbs hanging out.
Definitely better than that guy who dropped out of high school and did coke until his rich daddy got him a job and now he posts about how hard work and manifestation are the keys to success.