It can absolutely be used for bad, and I know many sites do use it for bad. However, it does good as well, and I think it's important to develop but also it should come with similar permission requests that use of microphone or camera do.

I do research and develop ANN's for data analysis within chemistry. Making it possible for less tech literate people to visit a site, select a model, load their dataset, and get answers, is quite handy. The best part is because I can use their hardware to do it all, it all stays private, no one has to upload any sensitive research data etc. and I don't have to ship to various devices etc. I know if they have a mainstream updated browser they can likely use the tool. No endless requests for help, no mystery issues to solve, things just work.

> it should come with similar permission requests that use of microphone or camera do.

Such permissions requests have been associated I think exclusively with input and output, not computation.