Listening in without consent is invasive and can be unethical.

Privacy Concern

'Listen in' implies a deliberate effort to hear a conversation not meant for you.

Secretive Nuance

Using 'listen in' in this context often carries a judgmental tone.

'Listen in' suggests you're hearing the discussion but not contributing.

Professionally, 'listen in' can mean you’re included to observe or be informed.

'Listen in' indicates an intention to stay tuned and attentive to a broadcast.

Relates typically to media; implies you're joining a wider audience.

Can evoke a sense of tradition or fond memories from the past.