CCP does have their own dedicated security team that has dealt with cheaters in the past 11 years since Eve Online first started. Although most of those cheaters were bot users.

The biggest concerns right now are the following:

• Client Hackers - These people try to find ways to manipulate the files in the client in an effort to circumvent the system. This can easily be countered by implementing a client-side checker that scans key files for any attempt at data manipulation. Even the data manipulated through the memory can be detected. This is one way of tracking a cheater. If they somehow avoid the scan, then behavior tracking is used. Trends, patterns, and other aspects of human behavior can be used to track and flag cheaters who somehow avoid the client-side scans. This is often used to track market bots, mission bots, mining bots, RMT rings, etc.
• Account Hackers - These are people who are often involved in RMT rings who somehow gain access to individual accounts and then clean those accounts of any ISK, assets, as well as selling off the characters of those accounts for however much ISK they can get for later selling in RMT rings. Usually this happens as a result of using botting software that cheaters buy from an unknown software seller. The botting software is always packaged with key loggers and other malware that these unknown sellers use to gain access to the account.

Considering that Legion will likely use the same client-server setup that Eve Online has, and if Steam gets involved, then cheaters will likely be kept to a minimum.

But just remember that no measure is full proof. There will always be that one cheater who circumvents the system and thus the developers have to make a new counter to those counters. It's a never ending cycle. The best course of action is to mitigate the problem.

Ugh, CCP already has 11 years experience tackling client modification, and these days there are many excellent statistical anti-cheat systems out there - those are much harder to avoid.

Plus, y'know, the whole 'consoles have their fair share of cheaters too' thing.

Last time I checked, EVE could be downloaded from their site, or through steam. And as I've said, There's little/no hacking in EVE, and most of it is ingame, because of oversights.

If EVE had hacking problems, then I'd say okay. But EVE doesn't, so I call bullshit.