You were previously talking about licences and ownership of "any games". What you mentioned now is an orthogonal concept, and affects a subset of all games sold.
Some aspects of the license covers "any games"... like not being able to sell copies. Some only impact games with an online component, like AC here. All these restrictions come from the license agreement you buy.
You're purchased "good" was a license to use some software. That license defines the rules for using that software. If the license says they can remotely disable your game then they can remotely disable your game without violating the license or committing fraud.
There is of course some question about the enforcement of licenses, particularly click through licenses, but the legal doubt doesn't help due to the arbitration clauses in those same licenses and/or challenging them in court being ridiculously expensive.
You were previously talking about licences and ownership of "any games". What you mentioned now is an orthogonal concept, and affects a subset of all games sold.
Depriving me of the use of my purchased good that way is fraud, of course. <https://news.ycombinator.com/item?id=27348526>