What anyone obviously CAN is to write comments in internet. People having absolutely no skill tend to attack others, so they feel just a bit more... useful. Problem is, they're not adding anything.

In every community we have a few who create something and huge amount of useless bystanders who either try to learn to do something themselves or bitch around to feel they participate somehow.

Every lake has fish, plants and floating trash. You, dear sir, are this old toxic barrel at the bottom. Can't really help the ecosystem, but wanting soooo much to do something, anything, so You slowly poison the water.

Generally I see people saying "anyone can..." as useless, unambitious trash, kind of noise in the background. Anyone can, but You won't, because You're too good for it, right?