Is it creepy to monitor my family's web activity?

It's either two things.

1. Your protective-older-brother (or sister, idk) image is just a facade for your morbid, yet slightly perverse curiosity for your siblings, probably mostly the 16 year old sister more so than anyone else.

2. You're becoming extremely controlling of others, because you have no control over what's happening to your personal life. It could be anything that involves a drastic change (graduation, college, job, failing, wanting a girlfriend/boyfriend, etc). So instead of dealing with it and going through the motions, you rather take it out on others around you.

I think it's mostly 1, with a hint of 2; because you are at that graduating, beginning-college-soon, and curious about sex age.

Who monitors your browsing, and is it good?

It's creepy. It's not your place.

Since you say your eldest sibling "found out about this", it sounds like you haven't mentioned what you're doing before.

Do you listen in on their phone conversations and follow them around to eavesdrop on what they talk about with their friends? Maybe you have their rooms bugged, and GPS trackers hidden in their backpacks as well?

I'm with your sister: it's creepy and stalkerish.

Tealights is also right: it's controlling and suggests an unhealthy, obsessive interest in the life of your siblings, particularly your sister.

Unless your parents are totally indifferent to the well-being of you and your siblings, it's really none of your damned business what your siblings are doing on the internet. You're a brother, not a parent. Your parents should be the ones discussing with your younger siblings all the very real issues relating to the internet and social media. If you feel you have a better handle on those issues then your parents, then they should bring you in as a consultant during those family talks. They should not be making you the family Net Nanny.

Creepy as fuck. While your intentions may be good, eww. My little brother recently told me that my older brother is doing the same thing. Not because he needs to, just because he can, as an IT guy... it's disturbing to say the least. If it was happening to me, I'd rip off some balls. I dont do shady shit, but I expect my privacy to be respected.

Its extremely creepy and overprotective. What if they dont want you knowing about something?

Yeah you sound creepy as fuck.

Snitches get stitches brah.

Keep you side of the street clean and let your parents raise your siblings. I dare say you have a twig or two that has fallen from your tree so just look after yourself.

It's very creepy.

I agree with your sister. Ask yourself first, would you be comfortable with someone monitoring your web activities?

I would say it is creepy. If a 16-year-old is a younger sibling, then how old are the others? They're practically adults, it's ridiculous to monitor if they watch porn and then scold them if they do.

Yes it is.either ur parents aren't doing good parenting they shud seat down with the younger siblings n let them know wrong and right and consequences for their actions not being controlling u wont control them their whole lives

I find creepy in general, and dangerously overprotective. How would you feel if your parents did this to you?

As long as you're not jackin' off while you're doing it, you should be fine.

M8 when I was your age I used to help monitor a whole school

Yes but you should be upfront with them. No need to always Monitor them unless they are into bad sh:^. If not they can browse whatever they want as long as it's safe

I won't call you a nazi.
But, you suck.
Mind your own fucking business.
As for porn, fuck you.
Porn is awesome.
If I was one of your unfortunate siblings I'd just get it at a friend's house.
You aren't accomplishing shit.
Except alienating your own family.

How about teaching them that some websites are bad?

They might not like it. My husband follows my son evan around everywhere and complains about him not doing anything right.

How do your parents feel about all of this?

Yes it is.