acrostic - Teapot Riddle no.23 (fan made)

Rules: I have one word which has several (2 or more) meanings. Each of the meanings is a teapot (first, second ...). You try to figure out the word with the conversation between the teapots

Hint 1:

First teapot: Humans are annoyed of my existence
Second teapot: Probably yeah, they are shocked even if they get a hint of my existence

Hint 2:

First teapot: Humans hate me. Do they hate you as well?
Second teapot: Eventually they hate me too, but it has always been complicated

Hint 3:

First teapot: I remind them of their mistakes
Second teapot: So you help them to rectify? I remind them of what they spoke

Hint 4:

First teapot: Yeah, I am useless if I don't show up
Second teapot: Totally agree.. But I am useless if I do

Answer

I think the answer is

Bug

In particular

First teapot - bug, error in computer program or system
Second teapot - bug, a concealed miniature microphone

First teapot: Humans are annoyed of my existence

Computer bugs are a sign of something going wrong in a program.

Second teapot: Probably yeah, they are shocked even if they get a hint of my existence

Anybody would be shocked to find out they are being bugged.

First teapot: Humans hate me. Do they hate you as well?

I always hate when my code hits a bug, but they can be very serious.

Second teapot: Eventually they hate me too, but it has always been complicated

There is a complicated balance always at play between personal privacy and state security.

First teapot: I remind them of their mistakes

Computer bugs are the result of human error.

Second teapot: So you help them to rectify? I remind them of what they spoke

Surveillance bugs record conversations.

First teapot: Yeah, I am useless if I don't show up

Bugs are important to spot to make your code better.

Second teapot: Totally agree.. But I am useless if I do

If you find a surveillance bug, who knows what has been recorded.

Acrostic

The first letters of the second teapot's sentences spell PEST - a synonym for bug.