Not true.

Know a guy who called in sick, then quit. Delta rescinded the offer of employment. Delta perceived it as a matter of integrity and honesty.

Rumor was in 2001 Delta helped obtain reinstatements of some jobs and hired applicants into other positions when hiring was abruptly cancelled after folks had provided their previous employers on notice of Delta employment. Did not know any of those folks personally, so someone else can come along and comment on that, if it actually happened.

Simple moral of the story. Honesty is a part of Delta's culture.

Further, Delta has been good about honoring hiring commitments. It seems as though the Company tried to avoid furloughs post merger and these day, with flying on the rebound and retirements looming, Delta needs pilots.