If they are HDPE, we would be more than happy to accept them; I believe a harder plastic wouldn’t work well because it could chip out. But I’ll also defer to people more knowledgeable, I’ve only ever used HDPE.
And don’t worry - I don’t know you in person, but your TALK persona is enough to convince anyone that you’re not the type of person to do this.
The reality is I’ll never find out who it was - I’m sure it’s on camera, but don’t really see a point in checking them now. Either the person who did this will see this, feel 30 seconds of guilt and be better or they won’t see it at all and continue until they’re eventually found out. It is what it is, and all that can happen is trying to be better going forward.