I am just going to reference the red flags (linked) from @instructor144 and let you do some reading on a similar topic from a trusted source that will provide you more knowledge than I can. There is a lot to read, so pens and pencils.
It may not answer your question directly, but it will give you insight on things you’d need to know should you be looking to move into this world of D/s.
To answer your question in a more obvious fashion – yes, there are fake everythings. Some people are just asshats. Be knowledgeable and learn; trust your intuition. If it feels wrong, it probably is.