There have been some rumors on my realm recently, too. I have no idea where they come from, and I usually ask for a source.

All of the times, it turned out to be something like:
"My sister's neighbor's niece said she heard that it will become illegal soon."

Give me a break. What is their motivation (other than jealousy and malevolence)? I get the feeling that if they cannot stop me from playing the game as I like it, they have to at least try and get me worried.

(Moreover, I find the term "illegal" fairly inappropriate, as it refers to breaking an actual law.
Blizzard does not pass or enforce any laws, and someone who cheats in the game is not a criminal.)