To have called the police about this?

[Robbabank]

We live in an 'edgy' (dodgy) inner city area but one that has plenty of families in flats etc. Called into local convenience store around the corner from our home for milk and essentials with my 2 daughters (7 & 9) on way home this evening at about 7pm. We had just been to a little event and the girls had had their faces painted with day of the dead patterns - they were all happy... On leaving the shop there were 4 or 5 young men standing just outside the doorway (about 18-21yrs - all wearing hoodies so hard to see their faces). They moved aside for us to get past and they were talking loudly amongst themselves but seemed to be occupied with their own conversation. Car was parked just outside the shop and I belted my girls in and closed the doors, then went to the boot to put in the shopping. When I came around and got in the front my 9yo daughter's face was turned to the side and she was crying. She said that one of the guys had opened her door and leaned in to her and said "Trick or treat!".
She was really upset, frightened and shocked and couldn't quite process that it had happened.

I can see that the idiot who did this would see it as just a harmless prank, but am I right in thinking it's an intimidating act towards a child? Or are there any repercussions for opening someone's car door without permission?
I know this group of lads to see. They stalk around our area, checking out cars and I've seen them hassle another young man and then minutes later rob a bike from a young lad a few months ago on the same stretch of main road.
I've not had any run-ins with them myself and I doubt they know me by sight as, unlike me, they don't really have to.
Anyway I called it in to the police and they're coming round early in the morning to take a statement.
In a way it is better that I didn't catch them in the act as I would definitely have shouted at them and asked wtf they thought they were doing (adrenalin!), but I realise I wouldn't really have known what to do after that and would have been leaving myself and my 2 children vulnerable to further harassment from them.
It's angers me too on gender lines as I'm pretty sure that it wouldn't have happened if it had been their father belting them into the car and it leaves me feeling very frustrated that women and girls are perceived as easy targets by these guys (well, one of them).
So, am I AIBU to call it in to the police? I've explained it wasn't personal and was just showing off, but what else can I do to reassure and empower my daughter(s)?

[CiaoVerona]

How is it gender based when you clearly state on previous occasions they have targeted a young male! Most def bullies though.

[kali110]

I think it will be a waste of everyone's time.
I'm not devoid of empathy it scared your daughter but What's the crime?
I don't understand logging?
user i thought police didn't actually log anything?
Think i'd be concerned that if the police went to speak to the lads involved that then you'd be a target as they'd know was you that had reported them.

[user1477282676]

Ciao OP was responding specifically to my comment regarding teaching girls to use their voices.