Ooh, I don't remember frankly, it's almost 2 years ago now. I can admit it now - I run it on my school's network that has about 50 computers. I would say I switched computers about 10 times.
I am not sure if it was anti-spam or anti-ddos or just anti-scraper measure.
You mentioned you had to switch computers multiple times, about how many times was that? Sorry on the off-topic...