OAI university endpoints

I’m using university journal portal OAI endpoints for the third time in a row to fix a typo and handle DOI lookups. Does anyone know how disrespectful or intrusive this is considered to be? A few years ago, I scraped arXiv and they blocked my IP almost immediately; perhaps if I had used arXiv’s OAI interface, they wouldn’t have blocked me. But I really have no idea just how disrespectful or intrusive this is!