How can word be offensive?

How can anyone be offended at the word grockles? It means a person in your home patch who is on holiday – what is offensive about that?

Even if a local uses it when annoyed by traffic queues or other inconvenience, he or she is also aware our local economy is somewhat dependent on them so it is not used with any malice.

Madeline Goodall

Piggery Hall Lane

West Wittering