Is it wise for researchers to thank Alexandra Elbakyan (founder of Sci-Hub) in the paper acknowledgements?
I'm hoping here that you want to express your opinion that we need a site on which broad copyright license is granted by authors, rather than held closely. I hope you aren't expressing favor of a site in which copyrights of others are simply ignored and not respected and on which illegal activities occur. 

I, too, think a site on which people voluntarily agree to a broad license to their work is granted would be a very valued thing. But I wouldn't praise any site that actively encourages the disrespect of authors and their rights. 

I don't have a lot of use, either, for journals and other publishers that demand the rights from authors, but that is a different problem. 

But, to answer the question directly, associating yourself professionally with behavior treated by many as unethical and even illegal, is probably a mistake. Tactical, if nothing else. You won't really effect the needed change that way.