I imagine every ETS member is a prepper.
Probably you are wrong about it. I would not consider myself as a prepper in the usual sense. Maybe others wont either.
I don't need to worry about what you know about me.
That may be true for the majority. There might be some sheep with darker wool in the flock (just a prudent assumption, no actual evidence). Then there are the guests and spiders.
IMHO networks like Facebook are much better hunting grounds than ETS anywhere. People there share much more info that can be used to track and evaluate them.
If you worry, categorize information and potential zombies and two-legged predators. Select the info you share accordingly.
Be realistic about the actual risk though.
The greater risk may be lurk in your vicinity anyway. Neighbors tend to spread sensitive info carelessly.
PS: If you are serious about not sharing too much personal info, your name IRL contains neither Jeanette nor Isabelle.