How do you refuse to work with graduate students when they come to you and explain they want to work with you without necessarily being offered a job (e.g. a project that pays).
My advisor was very selective, he had conditions - students would need to take a course, Ace it, be in a percentage, then take a personality test, volunteer etc etc. He had many projects and million dollar fundings so it was just easy for him to have the authority and the department would be okay with this.
I am only starting and I have realized that I have been kind of soft about this, especially with international students knocking on my door and saying they want to work with me I accepted to be their supervisor. They have their scholarships too so I suppose that shows they have gone through a selection process, and it could be good for me. However, I noticed that it is actually very slow and time consuming to get them to a point where they start working on their own, and if ever happens, work academically (not just applications).
So I decided to be more selective. Then this student comes in and wants to work with me for all the wrong reasons. they have worked in field X for more than 5 years but wants to do their thesis on a new topic just so they will learn it, they didn't bother to take any related courses either. This is a student who deserted their MS some years ago and came back to finish somehow, sees literature review credits as "some checkbox". They signed up for the credits without talking to me (I didn't approve it, but the course is opened without a lecturer on paper, but students are expected to work towards their thesis with their supervisors)
When I explained them they don't have the necessary background, and I really don't have the time to start with a student who doesn't have the necessary beackground. They have insisted which would make me reconsider but the way they insist, using an authoritative language which is outright forceful, and it rubs me off the wrong way really, if I am a couple days late on reply, they send me emails (copy paste) repeatedly to my non work related emails as well (I don't know how they got it btw). Nothing shows up about the student btw as they are super secretive using initials only even for the email, basically a bit intimidating. Their motivation is again a combination of wrong reasons imho. I don't want to waste my time and also their time. It is obvious that it isn't the right fit, I don't want to take up more students because I feel responsable for the ones I have, besides there will potentially be personal problems as well, my students are respectful and they are motivated by their topic, but I am not sure how to handle a student who thinks an alpha language is going to change my mind. but how to send this message across?