The question is more of are you allowed to ask for sushi when you're in a burger joint? Both places served food, but only you who knows what you want to eat (post), others can only give suggestions (list of servers).
If it's not what you want, it make sense to move, right?
Also, you can see the "menu" before going in:
* server rules under /about
* sneak peek of what people's are posting inside the server under /public or /explore
@rootadmin @tasket Alright, if you want to go with “don’t join our server unless you have read all the details and want to join our server,” that’s fair. Seems counterproductive if you want marginally interested visitors to join.