I'm definitely a snacker. Not so much at work - I usually have breakfast and coffee. But I always always have an afternoon snack (around 3:00 or 3:30pm) of 3-4 points worth (usually a small apple and an All-Bran Bar). This helps until I leave work around 5:30pm. We usually eat dinner by 6:30 and I have a small dessert (1-2 points usually) before jumping on the treadmill by 8:00 or 8:30 pm.
Of course, today I've been very hungry (Ok, i wasn't hungry - I was bored and I knew it...even though I gave in and had a couple of extra Whole wheat tortillas) and I am definitely PMS'ing...
I just need to re-vamp for dinner tonight and get my rear on that treadmill so I can end the week on a good note
But, to answer your question - I think snacking is definitely ok. Especially if you have always been a snacker. Once you get used to WW for a while you will definitely feel yourself in better control of the choices that you make with your food.