Due to a sad trilogy of events at the end of last century (specifically Episode 2: Texas BBQ) the ATF of this century mostly conducts stings and information based enforcement (i.e. nabbing people for buying Glock switches online). Were they to go back to kicking down doors of people who are generally considered normal patriotic Americans they would A) be more likely to get shot back at than any other agency (much easier to justify and mentally prepare yourself to shoot back at career snake steppers than your local PD) and B) have some really, really bad optics to contend with.

If you're worried about someone taking your guns be worried about the state police.