Why would it be? My clients have busy lives and careers so they would rather NOT attend court unless it was absolutely necessary. I can't imagine why a defendant would WANT to be in court on an unnecessary appearance except maybe someone just sitting in jail and wants a field trip. If you don't want to be in jail then bond yourself out and, if you can't, ask your attorney about the possibility of a bond reduction.
Short answer: no, what you describe is not illegal nor is it unethical.
personal check
i was given a check dated may 8 2007. I was asked 7 days later not to cash the check, but wait until May 21st to do this. I deposited it May 23. It bounced. The writer of the check says that since he asked me not to cash it I am in the wrong. What can I do about this bad check.