Is there such thing as a *small* cocaine problem?

Played a home game last night and this guy was using his cards to cut out lines on the rail. Like, every 30 minutes or so. I'm not all that familiar with cocaine usage, so I asked him, "Hey, bro, maybe that's a bit much?" when I noticed some of it getting on the cards.

He said he has a small problem, but not a full blown problem. Is this a thing in poker circles? I've seen people doing it before, but not with this frequency and at the table.