Being able to drop someone else's full site contents is not something anyone should get away with under any circumstance.

The want to prevent pirated theme - reset the theme to twentysexteen; block frontend access; overlay frontend with notification, etc - so many options. Deleting data? That is not one of them.

I won't even get into the deliberate other plugins disabling with comments like "sorry not sorry", including cache plugins to advertise their own hosting.

Conclusion: nasty, lying bag of s*.