Wikisource:No open proxies

Policy
Open or anonymising proxies may be blocked for any period at any time. While this may affect legitimate users, they are not the intended targets and may freely use proxies until those are blocked. No restrictions are placed on reading     through an open or anonymous proxy.

Proxies are left open due to deliberate or inadvertent configuration or because hackers have changed the configuration. Non-static IP addresses or hosts that are otherwise not permanent proxies should typically be blocked for a shorter period of time, as it likely the IP address will eventually be transferred or dynamically reassigned, or the open proxy closed. Once closed, the IP address should be unblocked.

Rationale
Although Wikisource encourages anyone in the world to contribute, such proxies are often used abusively. Since MediaWiki (the wiki software) depends on IP addresses for administrator intervention against abuse, open proxies allow users to completely circumvent administrators. The use of scripts or bots allow malicious users to rapidly rotate IP addresses, causing continuous disruption that cannot be stopped by helpless administrators. Several such attacks have ocurred on Wikimedia projects, causing heavy disruption and occupying administrators who would otherwise deal with other concerns.

This policy is known to cause difficulty for some editors, who must use open proxies to circumvent censorship where they live; a well-known example is the government of the People's Republic of China, which sporadically attempts to prevent its citizens from reading or editing Wikipedia. Chinese readers who wish to edit Wikisource should read advice to users using anonymizing proxies to bypass the Great Firewall.