I don't believe checks are any higher risk.
You pay online...you have either entered your bank info or your CC info.
How many times have we read about so and so being breached and all our info is out there???
You order online, your CC info is out there. Even if you don't store it...these 'brilliant' hackers have a way of getting it.
My Discover card has been hacked 3 times over the past 4 yrs while it never left my purse.
I just keep an eye on everything so I can report any funny business immediately.