No! Mods are short for modifications, which change the gameplay slightly. They aren't illegal, they just support only the version of minecraft they are compiled for. Jeb is even thinking of adding "Mod Support".
Although, If you are playing on multiplayer servers, you should check the rules because some servers ban certain mods/hacks. Some servers even require you to download certain mods and/or texture packs to log into them (Tekkit servers, etc.)
No it is not illegal.
No, Minecraft Forge is not illegal! That is why many people still use mods.
Yes, most Minecraft Mods are updatable.
bearshare is not required to get minecraft mods.
Unplug your hard drive and put it in your computer and get mods for minecraft
No it is not illegal.
No, Minecraft Forge is not illegal! That is why many people still use mods.
you can get minecraft mods and textures off the minecraft mods website.
Yes, most Minecraft Mods are updatable.
bearshare is not required to get minecraft mods.
there are no mods in minecraft pe i hope there will be
Currently Minecraft Xbox 360 Edition doesn't have mod support so no mods can be installed, but when it is added, the creator of 'mo creater' will probably release it soon after.
No, it is not. However, it will probably not work on multiplayer servers unless this mutant mod you are talking about is a client-side mod, which is like a hack client, and would not be allowed on most multiplayer servers. If you are talking about mutant mods as "illegal by Mojang", then no.
you can get most minecraft mods off the minecraft mods website, or you can google.
Unplug your hard drive and put it in your computer and get mods for minecraft
On Minecraft Forums
you can easily get mods from planetminecraft