If someone who doesn't like me makes an "anonymous" call to 911 to report that I'm running meth lab in my garage, does that also give the cops the right to ransack my house looking for a meth lab?
Yes, if subsequent investigation leads them to believe you're running a meth lab, they'll get a warrant and ransack your meth lab.
Why the fuck are people acting like anonymous tips are a new thing? Do you actually believe they act on every tip and do so blindly? Does this magic 911 phone technology make it all too scary for you?