Geez, Puck,...only 2,000? I have just over 78,000 in the list now and it grows by about 250 to 500 per day here lately. My blocks include IP's, blocks of IP's, domain names, email user names, combination of user and domain names, and subject lines.
ccvi, you only risk being blocked if you try to directly send email from your computer with it acting as the SMTP server, and not using the ISP's SMTP server.
Oh, and I get about 800 SPAM messages per day, but I have intentionally set myself up to get SPAMMED so I can try to catch the monsters before they can hit my clients.