AITA for not letting people tailgate me through the scan-to-enter lobby door of my apartment building?

A resident who religiously scans their own key fob and always lets the lobby door shut behind them got called an a__hole by a tailgating neighbor. Clear signs on both sides of the door scream “Do not let in people who are not your guests,” yet the guy fumed over the 8-second delay.

What makes the story more complicated is the shared elevator wait anyway—no one saves time by piggybacking—and the building’s strict no-sharing-elevator policy. Security vs. courtesy collided in a locked lobby.

‘AITA for not letting people tailgate me through the scan-to-enter lobby door of my apartment building?’

The building’s entry ritual is simple but non-negotiable.

A tailgater’s tantrum erupted over a door that shuts itself.

Secure residential buildings are fortresses by design, not convenience stores with open doors. The resident’s ritual—scan, enter, close—isn’t passive-aggressive; it’s the final firewall in a system that includes cameras, buzzers, fobs, and signage on both sides of the entrance. Tailgating doesn’t just shave seconds; it obliterates the entire security architecture. One “friendly” hold-open can let in an abusive ex, a package thief, or a vandal who now knows the lobby code by watching your thumb.

Critics might whine about “wasted time,” but the delay is negligible—literally the time it takes an elevator to descend three floors. In addition, the building’s no-sharing-elevator rule eliminates any illusion of collective efficiency; everyone waits alone anyway. Property security consultant and ex-NYPD sergeant Tom Connors, in a 2025 Buildings magazine feature on urban access control, warns: “Tailgating is the #1 way controlled-entry buildings get compromised. A single breach can lead to $10,000 in stolen goods or a restraining-order violation. Signs aren’t décor—they’re legal notice.”

The tailgater’s outburst exposes entitlement: he wants your credential to grant his access, risking everyone for his 8-second shortcut. The resident didn’t just follow rules—they enforced them when management can’t. In an era of porch pirates and doxxing, vigilance isn’t paranoia; it’s civic duty. The real a__hole is the one treating a locked door like a suggestion.

These are the responses from Reddit users:

Users unanimously crowned the resident NTA, citing safety over seconds.

A few shared horror stories or petty revenge fantasies.

Some comments with different opinions come from the user community

The resident upheld posted policy and protected the building; the tailgater demanded a free ride on someone else’s key. Eight seconds of patience vs. a potential break-in—math isn’t hard.When signs say “scan your own fob,” is letting someone slide ever okay? Would you smile and shut the door—or call security on repeat offenders?