Best not to overthink it - The sales clerk is trained to ask for this stuff.
Luckily most times I encounter this I just tell them no I don’t have a phone number with them & continue checkout like normal. Sometimes that means not getting a sale price on something but usually I avoid those type of member-specific sales anyway.
And worst case - Just make something up. At Best Buy a sales rep absolutely refused to sell me something from the mobile dept without my info. Which didn’t make sense because earlier I had bought something at that same Best Buy with a different rep & that rep took my order without my info no problem (she said she had to enter a phone number but just entered Best Buy’s).
Yet this particular sales rep refused to proceed without info, so yeah he got an entire fictional name/address/phone/email on the spot.
This was my first thought too. Interestingly that death occurred October 2023, while this particular fired employee is accused of accessing Disney’s menu systems around June-September 2024.
Almost like this ex-employee saw the news earlier and was then inspired to try to murder someone with bad allergen info.