Final answer:
The best way to prevent spam on a bulletin board system is to block the IP address of the spammer. CAPTCHA is also an effective measure to deter automated spam bots.
Step-by-step explanation:
The best way to prevent spam from a specific IP address on a bulletin board system for a rock and roll band is to block the IP address of the user. By blocking the IP address, the spammer will no longer be able to access the board and continue posting spam. This is an effective measure to ensure the cleanliness and integrity of the bulletin board.
Another option is to implement CAPTCHA. CAPTCHA is a security measure that requires users to prove they are human by completing a challenge, such as typing in distorted text or selecting specific images. This can help to deter automated spam bots.
Banning the user or disabling ActiveX are not as effective in preventing this type of problem. Banning a user may only prevent that specific username from accessing the board, but the spammer can simply create a new account. Disabling ActiveX might affect the overall functionality of the bulletin board system without directly addressing the spam issue.