The wiki is currently being attacked by a botnet. This means I am periodically blocking any IP that accesses the wiki a lot in a short period of time.
So if you start getting an error when accessing the wiki, just contact support with your IP address and I'll remove the block. This only affects the wiki, not any other services.
Other than filling up the log file, and perhaps making the wiki a bit slower, I don't think it's having any great impact on the wiki.