No. The point of minecraft being paid for is the services that are provided for multiplayer. You cannot enter a vanilla multiplayer server (When I say 'vanilla', I mean it can't be a cracked server. You can't enter standard Bukkit servers either) without an official Mojang/Minecraft account that has been paid for.
Also, I have noticed that many of the developers of the game have been asked these questions on Facebook and Twitter, and their general reply was that they don't really care, but encourage you to buy it as it supports them.
At the time of writing, they have sold almost 13 million PC versions. As much as using a cracked launcher wouldn't influence this number in the slightest, if everyone using a cracked version of the game bought a legitimate account, then the number could rise from 13 million to something as high as 20 million (just a guess - there is no exact number of cracked players).
TL;DR
I strongly reccomend buying the game, as you are not supporting the company by playing a crack. It is not illegal to play a crack, and it isn't illegal to make a crack (Although, both of these actions are frowned upon and I do not reccomend either).
Right, that should sum it up!
~Jamie
Chat with our AI personalities
I have an Anjocaido minecraft launcher myself, It's a cracked launcher enabling you to change your name everytime you log in and force updates. Getting the original minecraft for $20 or if they put it up $26 will show you the updates that notch has put in (and server i think).
No. The last version you can get with this launcher is 1.5.2. You can't even play 1.6 snapshots with it.
Maybe the server is temporarily not available or you are using anjocaido's minecraft launcher. If you have that you need to download Hamachi and Type Server iD IP Password and Gate
how to log in minecraft 1.3.9
Download the launcher at minecraft.net/download to play Minecraft.