If you accept the rules stay in the hub. If not, well best would be to leave.
Common rules you could expect from every hub if not stated otherwise are:
- No porn
- No advertising (Spamming other users with messages about how good that other hub is)
- No fakeshare (using a modified client that fakes a share, but does not really provide anything for others to download)
Also an important unspoken rule is that a user should respond to questions OPs ask. Its often hard for operators to keep an eye on the whole crowd so be happy about an OP having a problem with you, that tries talking first. Often OPs are accustomed to users not responding or expect users being offline and not in front of their PC. This results in an "First kick, ask later" attitude to get the attention of users. So don't be offended if a OP just kicks you with a message instead of first talking to you about your mistake. Its mainly a time thing not meant to be impolite. If you don't understand what the OP wanted to tell you with his message best is to just ask him on your next connect.
Much more information on the topic of common behaviour can be found on this website.