That's the thing, almost all comments on the internet can be seen by everyone worldwide. You shouldn't go making comments on the internet unless you're perfectly happy for them to be seen by anyone out there. Some celebrities seem to type things before they think.
I doubt though if it would occur to many people that a tweet like that would be read by burglars. You'd really need to be super-paranoid to think like that; if I felt I had to consider my comments on the internet that carefully, I just wouldn't go online at all.