serving the public is an important job. Many people eat that food every day. They depend on it because it's cheep and they are on a limited income.
Putting down a public service job is very low brow.
Also, your meme is flawed because if you do go through a drive through that means that you think that the people who are working there are OK.
PS: if you disrespect them they might make you a special burger, with extra special something in it.
be nice to your drive through window staff!