If you can’t handle something in moderation, it doesn’t matter whether you “should” be able to handle it. Social networking, alcohol, chocolate bars, whatever, … You’ve probably got at least one slippery slope item where a little always seems to turn into a lot.
You don’t cut off things like that because they’re so awful, and everybody must cut them off, but because it’s some personal kryptonite you’ve found out about and rationally must take into account. It’s tempting to say, you ought to be able to handle it, other people seem to be able to, etc., but it’s just about you.
There should be no more shame associated with that fact then there is with having a peanut allergy. I enjoy peanut butter now and then, and it’s no problem for me, but for somebody that’s allergic they must cut it out entirely. Just the way it is. The reality habit.