Low or high level, they're still trying to sell you something. I understand there's a place for it, but sometimes I just want no one to try and sell me anything for a few minutes out of my day. Unfortunately it can get extremely frustrating once you realize how many ads are shoved at you regularly. Or realizing you can't actually ask the salesman a question about a product/service because he doesn't have your needs in mind, just his commission.
Maybe the issue is with low level marketers is they're too focused on ads and sales and less so on the public relations and company image they're putting out.
The frustration builds up and I also tend to instantly judge and hate people who are "in marketing" or are salespeople. No offense intended, you're pretty awesome....I just don't want you to try to sell me anything.