So, if you're not sure how you feel about unions what have you done as an individual to improve your pay and how has it worked out? If they're saying no to the union, I'm guessing either you've done nothing or if you did ask for more money yourself, they simply laughed at you.

Given that, if you choose to cross the picket line, what you're saying to your employer is that you're happy with your pay which you say is not the case. You're also making the statement that you either think your co-workers who will be striking are either malcontents or greedy, unless you know they're getting significantly less money that you for the same job.

Your decision is simply whether or not you believe your and co-worker's current compensation is fair, or if the deal the union is proposing better represents your market value.