Copycat competitors copy design

I have a local business with a custom designed website and I completely dominate my entire area in a 100 mile radius.

I now have copycats, they copy unique parts of my design that is not seen anywhere else however in my design there is functionality behind the elements and they don't have that, it would be almost impossible for them to copy the functionality.. they only copy design part only.. Is there anything I can do about it or should I just leave it alone? I'm still crushing them and I don't see them as a threat but I just don't like to be copied when I spend so much hard work creating it.

Contact them and ask why they copy your style. Or make a post, information for your visitors that you have a copycat, just in case that they offer same services and their clients don't come to your site for support, that sucks. And don't be so sure for hard-to-copy functionality, specially if you use javascript for frontend.