I once kept a banana we'd picked up for DS to have with his weetabix and didn't eat [shock}.
The idea of pilfering half the buffet and keeping in in a handbag fills me with fear. A food poisoning disaster waiting to happen methinks.
My MIL, God rest her, would attempt to bring home anything that wasn't nailed down. Not that she needed it. Must be a generational thing. She always had a tupperware box in her handbag filled with sauce sachets, sugar, milk portions, salt & pepper, napkins, wipes, sewing kits, shampoo etc .
She'd also aquire glasses, ashtrays, dressing gowns, salt & pepper shakers none of which she needed. She wasn't exactly strapped for cash.
Here's me having a guilt trip of a banana.....