I applied on LinkedIn and then HR messaged me on LinkedIn a day later to send me a cover letter. I did and then got a message on LinkedIn to set up an interview. I reviewed the listing and was no longer interested and told HR. They sent me a nasty message saying "Do not apply for jobs you are not interested in" and then blocked me on LinkedIn... so very unprofessional and I am shocked. Makes me not want to work for this company or buy from them.