Feature:
Customer want to retain profile / audit information and ensure that they are tamper proof. Presently, the system.profile collection can be dropped if profiling is turned off.

Test case:

> use test
> db.system.profile.drop();
Sun Jun 5 13:02:28 uncaught exception: drop failed:

{ "ns" : "test.system.profile", "errmsg" : "exception: turn off profiling before dropping system.profile collection", "code" : 10087, "ok" : 0 } > db.setProfilingLevel(0); { "was" : 2, "slowms" : 100, "ok" : 1 }

> db.system.profile.drop();
true