Whoever treats others' information can only do so with a clear purpose and for a defined time period according to current EU laws.
If, however, you were referring to information that you published on the Internet for everyone's benefit then you would still need to consider intellectual property rights. In the open source software world we have the licenses that deal with this, and then there are copyright laws protecting content providers (not making a case here whether they are good or not).
I guess what makes a difference is if there is some business involved either in the production or in the consumption side of the equation and if we accept that "machine learning" is the same as "human learning".
EDIT: separated paragraphs, typo