@LMAO is flooding the site with random communities because they’re salty about being banned for claiming too many community names. They claim they’re trying to “fuck your entire site up” but I imagine it’s a relatively quick fix to delete all the communities they’re creating, LMAO.
In any address. Most email services support + and a few support . as well.
Sure but in gmail addresses, the dots are ignored, and anything after the + is also ignored. You can add as many dots as you want and will still go to the same address.