let me ask you this......if you had invited anyone else over at 7pm, and they banged on your door at 1 in the morning instead....THEN what would you do?
we always think we have to have SPECIAL rules for addicts....and while yes we do need some specific boundaries regarding drug use, theft of property, etc, for the most part we should respond as we would if it were anyone else. no free passes for meth heads who "show up" at freaking 1 in the morning!!!!!
and yes your considered response would have been absolutely appropriate. it's your home. your boundaries.