As another Oracle anecdote, a family member worked for IBM (this was about 15 years ago) as a software engineer and then as (what is now called) a sales engineer/technical consultant, where he'd travel to client sites and demo IBM products, answer technical questions, etc.

He said Oracle was without a doubt the most unethical competitor they ever had. IBM had internal guidelines on acceptable limits for gifts, meals etc you could give to clients, but Oracle sales people had no such qualms and would sometimes essentially bribe VPs/whoever had the power to make the purchasing decision.

IBM was certainly no saint (this family member ended up leaving a few years later), but he was astounded by how ethically untethered Oracle as a company was.