How necessary is it to restrict readers with suspicious IPs? This feature is for readers, any reader can get so IP. See also meta:Talk:No open proxies/Unfair blocking, [1][2][3], en:Wikipedia:Blocking IP addresses#Problems and solutions. @Kghbln, @Shirayuki @GZWDer @MusikAnimal
Topic on Extension talk:ShortUrl
This is the wrong place for this post (it should be at Extension talk:UrlShortener), and the aforementioned restriction is about creating short URLs, not using them anyway. And like any place in which text can be input there need to be some abuse protections.
Why? I'm interested only in the button in the sidebar.<br>And like any place in which text can be input there need to be some abuse protections. But we don’t restrict input in the search field. This feature is offered to all readers.
The "Get Shortened URL" post on the sidebar on this site is provided by the URLShortener extension, not the ShortURL extension. And the reason your search analogy doesn't apply is that searching doesn't create a publicly visible entry in a database that lasts forever, whereas creating a short URL does.
New topic: Extension talk:UrlShortener