My dear friends, do know that allowing or not alcoholic bottles does totally not depend of security. It is written in the ACO rules that bringing alcoholic beverages is forbidden. here is the link for the access regulation but in french. Sorry impossible to find an english version.
https://ticket.lemans.org/files/regl...cuits-2015.pdf
See article 6 that says it is forbidden to "smuggle" ( inroduire en fraude) or "bringing in force" ( introduire par force ) alcoholic beverages.
And the forbidden items:
At the 24 Hours of Le Mans circuit, you are strictly forbidden from possessing any kind of weapon, any dangerous or illegal object or substance (knives, cutters, bombs, explosives, scissors, aerosols/gas) or glass bottles. You may be searched on entering the site, and entry may be refused in the event of failure to comply with instructions.