IMO, it doesn't make sense for registrars to snatch names because reputation is everything in business. Not to mention they can lose their ICANN accreditation for front-running which to me isn't worth risking for a registrar whose core business is hand registrations. That said, companies are operated by people at the end of the day and there may be a bad apple especially at larger companies. Employees have their own motivations and one can do this without the company's approval if they had access to the data. Anyway, rather than speculating and worrying about things we can't control, why not just register the names that are available right away? If it's a good name, someone is bound to register it at some point anyway so why leave it up to chance?