Although questionable hiring practices are widespread in Mexico…age discrimination is the most common, labor-rights groups say…It also happens to be illegal, but Mexico's labor laws are rarely enforced...Mexico's Law to Prohibit and Eliminate Discrimination also outlaws age-based hiring practices but does not specify a punishment…[O]nly three people submitted complaints about age discrimination to the National Council for the Prevention of Discrimination that year, according to…[a] report…[O]ffenders aren't just Mexican companies…In one recent newspaper ad, Office Depot, of Delray Beach, Florida, sought a checkout supervisor age 22 to 35 for a store in a Mexico City suburb. Job websites are full of similar offers from Mars, 7-Eleven, Marriott Hotels…Most companies did not respond to requests for comment on their employment ads. Others said the ads were not meant to exclude certain people and that older candidates were welcome to apply.