Or bots. When I still cared about visitor statistics 10+ years ago, I saw unrealistic amounts of visitors using old versions of Netscape, browsers on Amiga and other niche systems. They were probably all bots in disguise.
I love it when people put the instruction for what to enter into a field instead of actually filling out the field.
I run into it ALL the time and no matter how you write instructions, at least 1/3 of people won't read them but just skim to what they think they need and then copy/paste. Ugh.
>Why are there (personal?) email addresses in there as well? Who sets that as their user agent?
Might be some programming exercise. It's a common network programming exercise to build a HTTP client using bare sockets. But they don't look like student email addresses.
Some APIs require contact info in the user agent header. For example, all calls to the reddit API are supposed to contain the dev’s reddit /u/username in the user agent.