This was almost certainly a “punishment” carried out by loyalist paramilitaries against someone they didn’t like, possibly for being a tout. I haven’t been back for a few years, but Bushmills is kind of a sad place. Aside from the distillery it’s mostly boarded up shopfronts painted to look like they’re still occupied.

Boo fucking hoo! Let me play them the world’s tiniest violin.

If they’ll ship to wherever you are, you should give Mash Gang a try. My personal favourite is a fruited west-coast IPA, but mostly I just like that they’re constantly trying new things. Since giving up alcohol, it’s the closest I’ve gotten to that feeling of trying a bunch of crazy craft beers and not knowing exactly what you’re about to get.