Being clocked can be humiliating and disappointing for transgender people who hope to pass as their true genders. However, this is not true for all transgender people. Some transgender people do not want to be confused with cisgender people and own their own gender presentation, even if it is atypical.
While some people do not mind being identified as trans, cisgender people should be mindful that clocking someone can offend. You may also offend someone if you presume they are trans when they are not. For this reason, it’s best to be sensitive and treat someone as they present themselves, whether you believe they are trans or not.