I just received an email from a lecturer I do not know and have never had contact with, asking for my course materials.
On the one hand, sharing my course materials has almost no cost for me, and I have shared them before either "in house" (with lecturers in my department) or with close colleagues (coauthors/community friends etc.). This is the first time I'm encountering a request from a truly random stranger.
I am inclined to refuse this request.
I put in a lot of effort into my course material, and take pride in my work. Handing it over to some other person (who may or may not credit me) feels like I'm cheapening my efforts.
I am I just being prudish? Is this common practice that I just never happened to encounter? Is there a potential ethical issue with sharing materials that I am missing here?