ronburgundy
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Not even in principle.
moral
/ˈmɒr(ə)l/
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adjective
adjective: moral
1.
concerned with the principles of right and wrong behaviour.
Thoughts are not behaviour.
It may surprise you to learn that dictionary definitions are not facts about the objective meaning of ideas. They are nothing more than a record of the current state of unstable changing linguistic conventions. In addition, many thoughts are the result of willful control of one's attention, selective retrieval of information, etc., which can be classified as "behavior", since even the definition you blindly rely upon does not limit behavior to physical movement. And BTW, talking and writing are physical movements, so even a definition the required this would still include writing or speaking one's thoughts as potentially immoral.