Any teen sitting in a grandparent's home basement at an ordinary neighbourhood can type anything similar. Just saying.
Another kind of people that could type these sorts of things, would be any paid industry shill or shills, working to leverage consumer hype on sites and social media by astroturfing while making have-nots feel inadequate to trigger their urge to consume and purchase overpriced things they don't need. Nowadays you have marketing companies with social media departments dedicated in doing nothing else through sockpuppet accounts. Some even invent fully fledged characters for that. Also, just saying.