I've had this message in the past, before I added a "delay" between scraping pages. The first 10-20 pages are usually without problems, but after that the server starts rate limiting your IP to reduce server load. This has nothing to do with other forum users,
unless they share the same IP address.
And then there is such an effect on the whole forum. I could not login my account for this problem yesterday. And I've heard it happened to a few more people. what wrong with Bitcointalk?
Are those people using the same Wifi?
In my house I use my Broadband connection alone. But I don't know how many people in my city use this forum using the same company broadband connection. Maybe your idea is true that using this forum with using the same company broadband connection is showing this problem.