School children sitting on my front wall

Jalima a neighbour had your problem, one morning she simply went outside scooped up the little pile, walked down the street and deposited it on the owners step, dropping a note through the door-"I think your dog left something on my lawn". It never happened again.

There could be an advantage in being on friendly terms with the local teenagers. The people who get aggro are the ones who hassle them! I'd just go and have a chat with them which would probably put them right off.

Never alienate.

At one time I went out and started to brush up the drive.
Hi there, nice to be finished school on a sunny afternoon.......
Them..... Oh hello missus..... Yes it is.
Me....not so food if you have homework.
Them.....do it later missus.
Me...... Oh it's great to be young and strong.
Them....laugh
Me......I'm serious, it's hard work for me to do this brushing up. Any of you fancy giving a hand?
Them.......chorus of Naaaah.... but one came and took the brush. He called on another to take the dustpan.
I chatted with 2 others about what a lot of homework they got.
They did a crap job brushing the drive, but we parted with a wave.

Are you frightened of them Blackcurrent or just feeling territorial?

Most youngsters are actually very nice people, just a few get the rest a bad press. Ignore them.

I was once on a train back from Scotland with two young children. It stopped for about an hour due to something or other on the line. or a signal failure.

There was a group of noisy Scottish lads a few seats back. One of them suddenly shouted 'Hey! Missus!' so ignored him. He shouted again 'Hey Missus!' and I pretended I was looking in my bag.
He then approached us and said 'Hey Missus, would the weans like a drink?' and held out a bottle of pop.

I was ashamed of myself. Luckily I had a bottle of squash in my bag so was able to hold it up and thank him for his kindness.

Taught me a valuable lesson.

A friend of mine has just bought a 1950's house with a low front brick wall and when I visited I said, "Oh let's sit on the wall , it reminds me of being a kid." We use to sit on the front wall and chat for hours but it was usual one of our own walls. I think we use to sit on the wall by the bus stop. Sitting on walls was more the norm as people walked and used public transport and were out and about more.

One area I worked in they told me on a nice evening they would come out and sit on their walls and someone would make a tray of tea.

I would be a little disconcerted if someone sat on my wall, but not really sure why. If they were there for a while I might go out and ask them if they were OK. Don't even like people who are not visiting me, parking outside my house and that is totally unreasonable and I would never say anything. Must be territorial.

'A little disconcerted' is far more reasonable than 'seething' which sounds an overreaction.
OP basically no, most people probably wouldn't say anything to teenagers who weren't doing anything.
Coolgran. - You certainly have an accurate board name!

I bet for them it is simply a convenient place to sit and talk endlessly as teenagers do - all about nothing. They won't think about whether it would annoy you or anyone really, that is how they are. I wouldn't worry if that is all they are doing, it won't last nothing does.