Only if they know you have accumulated such. Some things can happen at a slow pace.
I would think that providing my Preparedness Manual to the General Public has fairly much marked me as an enemy of the state.
They have the ability to view your spending in real time. Anything purchased with a check or credit card. Many companies collect your phone number as well, which allows them to track your purchases even if you pay cash.
Be very careful who you let know you’re prepping. Only my prepper kids and us discuss our plans.
And be careful who you let know you have emergency rations - unless you're prepared to ‘’share’ with them when they descend upon you.
Have supplies where they won't be easily found by the block wardens and SWAT-ers when they randomly raid, looking for ‘looters’ - which is now their legal label for anyone with more than 7 days of food on hand.
Good gravy, I only shop every two weeks - I'm a looter.
I grew up on a farm in the 30-40’s - we always had a YEARS worth of food on hand...in the gardens, the cellars. the barn, the hen house, etc.
Better have a safe place for storage....