While the security door was a cheap variety and either without a deadbolt or whatever the case was, I think it provided a warning system given the noise of its opening. It also slowed the group down by a little bit.

Camera did its job, too.

I agree with Skip that the mere shouting of “Police!” is insufficient and should not be relied upon as indicative of announcing a legitimate presence.

I also agree with Zundfolge that dynamic entry is overused. While I recognize and greatly appreciate the target law enforcement paints on itself for the furthering of public safety, I think it has morphed into something which is too dangerous for all involved with very little reward for the risk presented.